Re: low amplitude readings below 10MHz on a 8591E
Ok, it failed again but it is better then before 500Khz@0dBm? is -50dBm which is better than previous < -70dBm
Gr. Kees
P.S. strange .......
Ok, Now I am truly baffled. It works now.? 1Mhz : 0dBm gives with center freq 1 Mhz and span 1 Mhz a peak of 9dBm met 10 dB attenuation. When pulling and wiggling?the cable it goes down and up. Looks like a bad connection with the Marconi. At least that's what I think.?
Keep you informed.
Gr. Kees
Op do 23 mrt 2023 om 21:26 schreef KeesHofwegen via <radiohofwegen= [email protected]>: Gr Mike, I'll try to see what?I found so far, with the help of you and others. to recapitulate: 1. The unit under test is a HP 8591E, which I received about?2 weeks ago. 2. Changing?the date and time works. 3. Freq 0Hz , span 1Mhz, with marker peak -> 12.80 dBm 4. With CAL link connected 300Mhz : -21dBm, 600Mhz: -26 dBm, 900Mhz : -21dBm, 1,2 Ghz: -25dBm, 1.5 Ghz : -27dBm, 1.8Ghz : -36 dBm ? ? with atten 10db , ref .0 dBm 5. Attaching my Marconi 2019A to it output -10 dBm ( I trust my marconi to be within 5 dBm, check it with another frequency generator? ? ? ? ?fy6900 : until 60 Mhz). Measurement on the HPis : ? ? ? ? ?1Mhz : -58dBm ? ? ? ? ?5Mhz : -44dBm ? ? ? ?10Mhz : -38dBm ? ? ? ?15Mhz : -34dBm ? ? ? ?20 Mhz: -31dBm ? ? ? ?40 Mhz: -27dBm ? ? ? ?60 Mhz: -24dBm ? ? ?100Mhz : -16 dBm ? ? ?150Mhz : -14dBm ? ? ?200 Mhz: -15dBm ? ? ?300 Mhz: -10 dBm ?6. Cal Freq passes every time. ?7? Cal amptd: fail with the CAL link connected. ? ? ?solution to make it pass: ? ? ? ? ? ?a. add marconi with 300Mhz and -20dBm to the spectrum analyser. ? ? ? ? ? ? ? ?amptd passes -> save ? ? ? ? ? ?b connect link to CAL OUT y, amptd passes -> save ?8 Confidence test: fails on reference level test : STEP GAIN/ATTEN FAIL -6000 and SQR set to 110 9. All displayed results in the tests as described in?08590-90316.pdf from page 240 to 248 are correct EXCEPT ? ?FM coil driver which shows the same line and slope but starting about the point as described by -20dbM scale ? ?so higher up the scale. 10. Changed the connector ( I use bnc cables so have a convertor plug sp?) with other plugs, and changed bnc cables. 11. The error correction numbers as shown in flatness data look like other people have when they show that data ( youtube)., ? ? ?The display shows about the same shape as the people in the youtube clips.
I think that's about it for what I have found so far.
Observations 1. On youtube I see that the 0 hz level on my machine is much higher than theirs. The comb spectrum is much the same and their peak search always lands on the 300 Mhz while mine always gets the 0hz peak. 2. Some people advised?that the blocking cap on the input is at fault, I have to find out where that one is situated. I expect that it is in the attenuator?? 3. When I stepped the marconi from 1Mhz to 300 Mhz in one 1Mhz (manually,? so that's a killer)? I see a sort of exp function asymptotically going to the correct level around 300Mhz.?
hope this helps
Gr. Kees
Gr Kees, That¡¯s ok then. Perhaps to recap what you have found and what problem you still have ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 19:10
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I measured the battery,?3.69 volt so it is still good. ? Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Re: low amplitude readings below 10MHz on a 8591E
Ok, Now I am truly baffled. It works now.? 1Mhz : 0dBm gives with center freq 1 Mhz and span 1 Mhz a peak of 9dBm met 10 dB attenuation. When pulling and wiggling?the cable it goes down and up. Looks like a bad connection with the Marconi. At least that's what I think.?
Keep you informed.
Gr. Kees
Op do 23 mrt 2023 om 21:26 schreef KeesHofwegen via <radiohofwegen= [email protected]>: Gr Mike, I'll try to see what?I found so far, with the help of you and others. to recapitulate: 1. The unit under test is a HP 8591E, which I received about?2 weeks ago. 2. Changing?the date and time works. 3. Freq 0Hz , span 1Mhz, with marker peak -> 12.80 dBm 4. With CAL link connected 300Mhz : -21dBm, 600Mhz: -26 dBm, 900Mhz : -21dBm, 1,2 Ghz: -25dBm, 1.5 Ghz : -27dBm, 1.8Ghz : -36 dBm ? ? with atten 10db , ref .0 dBm 5. Attaching my Marconi 2019A to it output -10 dBm ( I trust my marconi to be within 5 dBm, check it with another frequency generator? ? ? ? ?fy6900 : until 60 Mhz). Measurement on the HPis : ? ? ? ? ?1Mhz : -58dBm ? ? ? ? ?5Mhz : -44dBm ? ? ? ?10Mhz : -38dBm ? ? ? ?15Mhz : -34dBm ? ? ? ?20 Mhz: -31dBm ? ? ? ?40 Mhz: -27dBm ? ? ? ?60 Mhz: -24dBm ? ? ?100Mhz : -16 dBm ? ? ?150Mhz : -14dBm ? ? ?200 Mhz: -15dBm ? ? ?300 Mhz: -10 dBm ?6. Cal Freq passes every time. ?7? Cal amptd: fail with the CAL link connected. ? ? ?solution to make it pass: ? ? ? ? ? ?a. add marconi with 300Mhz and -20dBm to the spectrum analyser. ? ? ? ? ? ? ? ?amptd passes -> save ? ? ? ? ? ?b connect link to CAL OUT y, amptd passes -> save ?8 Confidence test: fails on reference level test : STEP GAIN/ATTEN FAIL -6000 and SQR set to 110 9. All displayed results in the tests as described in?08590-90316.pdf from page 240 to 248 are correct EXCEPT ? ?FM coil driver which shows the same line and slope but starting about the point as described by -20dbM scale ? ?so higher up the scale. 10. Changed the connector ( I use bnc cables so have a convertor plug sp?) with other plugs, and changed bnc cables. 11. The error correction numbers as shown in flatness data look like other people have when they show that data ( youtube)., ? ? ?The display shows about the same shape as the people in the youtube clips.
I think that's about it for what I have found so far.
Observations 1. On youtube I see that the 0 hz level on my machine is much higher than theirs. The comb spectrum is much the same and their peak search always lands on the 300 Mhz while mine always gets the 0hz peak. 2. Some people advised?that the blocking cap on the input is at fault, I have to find out where that one is situated. I expect that it is in the attenuator?? 3. When I stepped the marconi from 1Mhz to 300 Mhz in one 1Mhz (manually,? so that's a killer)? I see a sort of exp function asymptotically going to the correct level around 300Mhz.?
hope this helps
Gr. Kees
Gr Kees, That¡¯s ok then. Perhaps to recap what you have found and what problem you still have ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 19:10
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I measured the battery,?3.69 volt so it is still good. ? Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Nothing special in a 1122A. Difficult bit is the connectors, You can use Binder 719s if you are careful plugging in.
Electrically a 50VA torodial with 2x 15V secondaries a bridge, two 2200uF caps, a LM7912 with a 1N4001 in the common to jack it up to 12.6V and a LM7815 will do the job.
Robert
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Hi?
does anyone know of an alternative to the hp1122A probe power supply, Has anyone done a DIY project of one.
Thanks
Dennis
|
Re: low amplitude readings below 10MHz on a 8591E
Gr Mike, I'll try to see what?I found so far, with the help of you and others. to recapitulate: 1. The unit under test is a HP 8591E, which I received about?2 weeks ago. 2. Changing?the date and time works. 3. Freq 0Hz , span 1Mhz, with marker peak -> 12.80 dBm 4. With CAL link connected 300Mhz : -21dBm, 600Mhz: -26 dBm, 900Mhz : -21dBm, 1,2 Ghz: -25dBm, 1.5 Ghz : -27dBm, 1.8Ghz : -36 dBm ? ? with atten 10db , ref .0 dBm 5. Attaching my Marconi 2019A to it output -10 dBm ( I trust my marconi to be within 5 dBm, check it with another frequency generator? ? ? ? ?fy6900 : until 60 Mhz). Measurement on the HPis : ? ? ? ? ?1Mhz : -58dBm ? ? ? ? ?5Mhz : -44dBm ? ? ? ?10Mhz : -38dBm ? ? ? ?15Mhz : -34dBm ? ? ? ?20 Mhz: -31dBm ? ? ? ?40 Mhz: -27dBm ? ? ? ?60 Mhz: -24dBm ? ? ?100Mhz : -16 dBm ? ? ?150Mhz : -14dBm ? ? ?200 Mhz: -15dBm ? ? ?300 Mhz: -10 dBm ?6. Cal Freq passes every time. ?7? Cal amptd: fail with the CAL link connected. ? ? ?solution to make it pass: ? ? ? ? ? ?a. add marconi with 300Mhz and -20dBm to the spectrum analyser. ? ? ? ? ? ? ? ?amptd passes -> save ? ? ? ? ? ?b connect link to CAL OUT y, amptd passes -> save ?8 Confidence test: fails on reference level test : STEP GAIN/ATTEN FAIL -6000 and SQR set to 110 9. All displayed results in the tests as described in?08590-90316.pdf from page 240 to 248 are correct EXCEPT ? ?FM coil driver which shows the same line and slope but starting about the point as described by -20dbM scale ? ?so higher up the scale. 10. Changed the connector ( I use bnc cables so have a convertor plug sp?) with other plugs, and changed bnc cables. 11. The error correction numbers as shown in flatness data look like other people have when they show that data ( youtube)., ? ? ?The display shows about the same shape as the people in the youtube clips.
I think that's about it for what I have found so far.
Observations 1. On youtube I see that the 0 hz level on my machine is much higher than theirs. The comb spectrum is much the same and their peak search always lands on the 300 Mhz while mine always gets the 0hz peak. 2. Some people advised?that the blocking cap on the input is at fault, I have to find out where that one is situated. I expect that it is in the attenuator?? 3. When I stepped the marconi from 1Mhz to 300 Mhz in one 1Mhz (manually,? so that's a killer)? I see a sort of exp function asymptotically going to the correct level around 300Mhz.?
hope this helps
Gr. Kees
Gr Kees, That¡¯s ok then. Perhaps to recap what you have found and what problem you still have ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 19:10
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I measured the battery,?3.69 volt so it is still good. ? Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: low amplitude readings below 10MHz on a 8591E
Gr Kees, That¡¯s ok then. Perhaps to recap what you have found and what problem you still have ? Mike ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 19:10
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I measured the battery,?3.69 volt so it is still good. ? Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: low amplitude readings below 10MHz on a 8591E
Hi Mike, I measured the battery,?3.69 volt so it is still good.
Gr. Kees
Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: low amplitude readings below 10MHz on a 8591E
Chuck, that's about my typing? rate, too! ? ? ? ? Jim Ford?
Sent from my T-Mobile 4G LTE Device
toggle quoted message
Show quoted text
-------- Original message -------- From: Chuck Harris <cfharris@...> Date: 3/23/23 11:30 AM (GMT-08:00) Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E
I must be missing something... Aren't you already going to: "poke a soldering iron around in the A16 pcb..." when you replace the battery? Hand copying data onto a list, and then back from the list into the instrument sounds like a great place to make a few mistakes... Or, so it seems to me, as one who can effortlessly type at a rate of over 40 errors per minute. -Chuck Harris On Wed, 22 Mar 2023 17:45:42 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: > As it is so simple to restore the data after the battery is removed > ,I personally would not like to poke a soldering iron around in the > A16 pcb. That¡¯s my opinion anyway Regards > > Mike g4wam
|
Re: low amplitude readings below 10MHz on a 8591E
Chuck,
With the greatest respect, I soldered my new battery into my 8594e with the power off.
Mine had the newer 3.7 volt disc battery which meant that you needed to separate the battery pcb from the processor pcb before the work can be done.
The amount of time taken to do this completely downs the processor pcb.
The restore procedure is well documented and if you have written down (the only way) the flatness and correction data beforehand all goes well.
best regards
Mike g4wam
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Chuck Harris Sent: 23 March 2023 18:30 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E I must be missing something... Aren't you already going to: "poke a soldering iron around in the A16 pcb..." when you replace the battery? Hand copying data onto a list, and then back from the list into the instrument sounds like a great place to make a few mistakes... Or, so it seems to me, as one who can effortlessly type at a rate of over 40 errors per minute. -Chuck Harris On Wed, 22 Mar 2023 17:45:42 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: As it is so simple to restore the data after the battery is removed
,I personally would not like to poke a soldering iron around in the
A16 pcb. That¡¯s my opinion anyway Regards
Mike g4wam
|
Re: low amplitude readings below 10MHz on a 8591E
I must be missing something... Aren't you already going to: "poke a soldering iron around in the A16 pcb..." when you replace the battery? Hand copying data onto a list, and then back from the list into the instrument sounds like a great place to make a few mistakes... Or, so it seems to me, as one who can effortlessly type at a rate of over 40 errors per minute. -Chuck Harris On Wed, 22 Mar 2023 17:45:42 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: As it is so simple to restore the data after the battery is removed
,I personally would not like to poke a soldering iron around in the
A16 pcb. That¡¯s my opinion anyway Regards
Mike g4wam
|
Re: HP 8656B display issue
Andrew, Do you have the service manual? The first thing that comes to mind is if you get the correct output even when the display is wrong, it may be the display shift registers. Service sheet 22 in the manual covers the display. The display decoders seem fine since no digit segments are missing.?
On Sat, Mar 18, 2023, 8:50 AM Andrew Curlik < kb2lmn@...> wrote: Video of what¡¯s happening??
?
|
Re: low amplitude readings below 10MHz on a 8591E
As it is so simple to restore the data after the battery is removed ,I personally would not like to poke a soldering iron around in the A16 pcb.
That¡¯s my opinion anyway
Regards
Mike g4wam
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Chuck Harris Sent: 22 March 2023 17:31 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E Given that it is so trivial to connect a backup supply in parallel before you remove the old, but still holding data cell, why wouldn't you? Usually, non chargeable backup batteries are connected to the memory's logic supply through a diode, and the 5V (or whatever) logic supply is also connected to the memory's logic supply through a diode, just connect the backup battery to the junction of those two diode's cathodes, before you remove the original and solder in the new. Be warned that most soldering irons have tips that are grounded to the power line bonding circuit. -Chuck Harris On Wed, 22 Mar 2023 14:13:27 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: Gr Kees,
There 2 battery types ¨Ccylindrical and disc shaped.
The older is cylindrical ¨Cit will probably be on its last gasps so
check the voltage before you remove it.
It is not backed up by a charger circuit., therefore when you change
it you will lose all the factory set up data so make sure you read
through the restore pages procedure and have all the data to hand,
The options if you have any will recover themselves except for the
gate option ¨Cbut I have the restore procedure for that.
Regards
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 21 March 2023 20:09 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
HI Mike,
battery date almost not readable but it looks like the last part of
the year is 32 so should be 83, 93
so I'll replace it after viewing some video's.
After replacement I'll see what the state is like.
The moisture in the shed is never above 60% so no moisture issues.
Tx for the help
Gr. Kees
Op di 21 mrt 2023 om 20:00 schreef Mike Lockley via groups.io
<mikelockley@...>:
Gr Kees,
My observation from what you are saying is that the unit is getting
too cold ¨Cthese units should be at room temp all the time.
The YTO LO does not like getting towards condensation levels ¨Cthey
have no heater built in to the YIG assy.
Also, what is the state of the internal 3.7v battery?
There should be a date on the back of the SA with the replacement
date .
If the battery is failing or failed you will get CAL fail problems
There is a lot of info on YouTube about battery replacement.
Regards
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 21 March 2023 18:24 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
hi Mike,
CAL FREQUENCY passes yes
CAL AMPTD ¨Cpasses with CAL link in place?
After switching it on tonight ( sched was about 13 C) it failed, but
with the marconi 300Mhz at -20dBm it did,
after that with the CAL link it passed the amptd CAL
CONFIDENCE TEST ? STEP GAIN ATTEN FAIL -6000 SQR 110
Will do it again after a 1 hr warmup
Gr. Kees
Op ma 20 mrt 2023 om 21:46 schreef Mike Lockley via groups.io
<mikelockley@...>:
That suggests a very strong LO signal ¨Ca good thing so probably not
a YTO fault,
Just to clarify..
CAL FREQUENCY passes
CAL AMPTD ¨Cpasses with CAL link in place?
CONFIDENCE TEST ?
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 20 March 2023 19:50 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi Mike its
10dBm above the ref lvl. with 10 db ATTEN
Gr. Kees
Op ma 20 mrt 2023 om 20:43 schreef Mike Lockley via groups.io
<mikelockley@...>:
Gr Kees,
Did you take a look at the 0hz feedthrough amplitude ¨C(left side of
display)
What value is it?
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 20 March 2023 19:28 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi Mike,
I've backup the constants ( paper) and used my marconi frequency
generator to have the amptd NOT fail.
After that the cal signal of the 8591E was used to do an amptd again
and this time it succeeded.
Still the lower end is terrible ( low amplitude ). I've done the
service diag and
1. the MAIN Coil driver is much steeper and starts higher at the
-20dbm horizontal line
The rest has the same picture as shown in the 8590-90316 manual.
So according to the manual it's in the A7 board. does somebody have a
spare will to sell
or is too premature.
Gr Kees
Op za 18 mrt 2023 om 20:20 schreef Mike Lockley via groups.io
<mikelockley@...>:
Hi
in your case from 238-247
if you haven¡¯t done it already ..201 onwards backing up correction
constants
One thing to check is the level of your LO feedthrough amplitude
..the signal at 0hz on the left hand edge of the display
Do frequency 0hz span 1mhz¡ and see what the level of the LO is
--good ones are around -10db or better.
By the way you¡¯re 8591 is a bit different on the front end than the
8590e series , yours is more prone to mixer failure but can be fixed .
Lots of info on you tube
Regards
Mike g4wam
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 18 March 2023 17:47 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
got it and will start reading.
Any recommendations about what paragraph?
Gr Kees
Op za 18 mrt 2023 om 18:19 schreef Mike Lockley via groups.io
<mikelockley@...>:
You need 08590-90316 from 2001
8590 series Service Guide
Are large tome but worth downloading or buying
¸é±ð²µ²¹°ù»å¡¯²õ
Mike g4wam
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 18 March 2023 14:41 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi,
Are we talking about the user manual 08590-90301, because there is
not much cal data in it
other than the normal stuff. I also have the installation,
verification & Operation manual.
Or are there other manual I need?
Gr. Kees
|
Re: low amplitude readings below 10MHz on a 8591E
Given that it is so trivial to connect a backup supply in parallel before you remove the old, but still holding data cell, why wouldn't you? Usually, non chargeable backup batteries are connected to the memory's logic supply through a diode, and the 5V (or whatever) logic supply is also connected to the memory's logic supply through a diode, just connect the backup battery to the junction of those two diode's cathodes, before you remove the original and solder in the new. Be warned that most soldering irons have tips that are grounded to the power line bonding circuit. -Chuck Harris On Wed, 22 Mar 2023 14:13:27 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: Gr Kees,
There 2 battery types ¨Ccylindrical and disc shaped.
The older is cylindrical ¨Cit will probably be on its last gasps so
check the voltage before you remove it.
It is not backed up by a charger circuit., therefore when you change
it you will lose all the factory set up data so make sure you read
through the restore pages procedure and have all the data to hand,
The options if you have any will recover themselves except for the
gate option ¨Cbut I have the restore procedure for that.
Regards
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 21 March 2023 20:09 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
HI Mike,
battery date almost not readable but it looks like the last part of
the year is 32 so should be 83, 93
so I'll replace it after viewing some video's.
After replacement I'll see what the state is like.
The moisture in the shed is never above 60% so no moisture issues.
Tx for the help
Gr. Kees
Op di 21 mrt 2023 om 20:00 schreef Mike Lockley via groups.io
<mikelockley@...>:
Gr Kees,
My observation from what you are saying is that the unit is getting
too cold ¨Cthese units should be at room temp all the time.
The YTO LO does not like getting towards condensation levels ¨Cthey
have no heater built in to the YIG assy.
Also, what is the state of the internal 3.7v battery?
There should be a date on the back of the SA with the replacement
date .
If the battery is failing or failed you will get CAL fail problems
There is a lot of info on YouTube about battery replacement.
Regards
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 21 March 2023 18:24 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
hi Mike,
CAL FREQUENCY passes yes
CAL AMPTD ¨Cpasses with CAL link in place?
After switching it on tonight ( sched was about 13 C) it failed, but
with the marconi 300Mhz at -20dBm it did,
after that with the CAL link it passed the amptd CAL
CONFIDENCE TEST ? STEP GAIN ATTEN FAIL -6000 SQR 110
Will do it again after a 1 hr warmup
Gr. Kees
Op ma 20 mrt 2023 om 21:46 schreef Mike Lockley via groups.io
<mikelockley@...>:
That suggests a very strong LO signal ¨Ca good thing so probably not
a YTO fault,
Just to clarify..
CAL FREQUENCY passes
CAL AMPTD ¨Cpasses with CAL link in place?
CONFIDENCE TEST ?
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 20 March 2023 19:50 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi Mike its
10dBm above the ref lvl. with 10 db ATTEN
Gr. Kees
Op ma 20 mrt 2023 om 20:43 schreef Mike Lockley via groups.io
<mikelockley@...>:
Gr Kees,
Did you take a look at the 0hz feedthrough amplitude ¨C(left side of
display)
What value is it?
Mike
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 20 March 2023 19:28 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi Mike,
I've backup the constants ( paper) and used my marconi frequency
generator to have the amptd NOT fail.
After that the cal signal of the 8591E was used to do an amptd again
and this time it succeeded.
Still the lower end is terrible ( low amplitude ). I've done the
service diag and
1. the MAIN Coil driver is much steeper and starts higher at the
-20dbm horizontal line
The rest has the same picture as shown in the 8590-90316 manual.
So according to the manual it's in the A7 board. does somebody have a
spare will to sell
or is too premature.
Gr Kees
Op za 18 mrt 2023 om 20:20 schreef Mike Lockley via groups.io
<mikelockley@...>:
Hi
in your case from 238-247
if you haven¡¯t done it already ..201 onwards backing up correction
constants
One thing to check is the level of your LO feedthrough amplitude
..the signal at 0hz on the left hand edge of the display
Do frequency 0hz span 1mhz¡ and see what the level of the LO is
--good ones are around -10db or better.
By the way you¡¯re 8591 is a bit different on the front end than the
8590e series , yours is more prone to mixer failure but can be fixed .
Lots of info on you tube
Regards
Mike g4wam
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 18 March 2023 17:47 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
got it and will start reading.
Any recommendations about what paragraph?
Gr Kees
Op za 18 mrt 2023 om 18:19 schreef Mike Lockley via groups.io
<mikelockley@...>:
You need 08590-90316 from 2001
8590 series Service Guide
Are large tome but worth downloading or buying
¸é±ð²µ²¹°ù»å¡¯²õ
Mike g4wam
From: [email protected]
[mailto:[email protected]] On Behalf Of
KeesHofwegen Sent: 18 March 2023 14:41 To:
[email protected] Subject: Re:
[HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on
a 8591E
Hi,
Are we talking about the user manual 08590-90301, because there is
not much cal data in it
other than the normal stuff. I also have the installation,
verification & Operation manual.
Or are there other manual I need?
Gr. Kees
|
Dear All
Recently I have got 2 HP 8350B sweep oscillators . And one can work well , another appears " E001 " error . ?These 2 RF plug-ins can all work well when insert to the good 8350B .
To repair?the bad 8350B . I have ?checked all the power on A7 board and on J3 connector , all the values look good . And then I check the J2 connector, all the power values look good and all the signals have been tied to the correct pins in the other board like A5 board , A7 board . These no short or open appear ?.
So I have no good method to check the error . Does anyone can give me some comments for this ??
|
Re: low amplitude readings below 10MHz on a 8591E
Gr Kees, There 2 battery types ¨Ccylindrical and disc shaped. The older is cylindrical ¨Cit will probably be on its last gasps so check the voltage before you remove it. It is not backed up by a charger circuit., therefore when you change it you will lose all the factory set up data so make sure you read through the restore pages procedure and have all the data to hand, The options if you have any will recover themselves? except for the gate option ¨Cbut I have the restore procedure for that. ? ? Regards Mike ? ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 20:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues. ? Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
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Re: low amplitude readings below 10MHz on a 8591E
HI Mike, battery date almost not readable but it looks like the last part of the year is 32 so should?be 83, 93 so I'll replace it after viewing some video's. After replacement I'll see what the state is like. The moisture in the shed is never above 60% so no moisture issues.
Tx for the help? Gr. Kees
Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: low amplitude readings below 10MHz on a 8591E
Gr Kees, ? My ?observation from what you are saying is that the unit is getting too cold ¨Cthese units should be at room temp all the time. The YTO LO does not like getting towards condensation levels ¨Cthey have no heater built in to the YIG assy. Also, what is the state of the internal 3.7v battery? There should be a date on the back of the SA with the replacement date . If the battery is failing or failed? you will get CAL fail problems There is a lot of info on YouTube about battery replacement. ? Regards Mike ? ? ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 21 March 2023 18:24
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110 ? Will do it again after a 1 hr warmup ? Gr. Kees ? ? That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: low amplitude readings below 10MHz on a 8591E
hi Mike, CAL FREQUENCY passes yes CAL AMPTD ¨Cpasses with CAL link in place? After switching it on tonight? ( sched was about 13 C) it failed, but with the marconi 300Mhz at -20dBm it did, after that with? the CAL link it passed?the amptd?CAL ? CONFIDENCE TEST? ? STEP GAIN ATTEN FAIL -6000? SQR 110
Will do it again after a 1 hr warmup
Gr. Kees
That suggests a very strong LO? signal ¨Ca good thing so probably not a YTO fault, Just to clarify.. ? CAL FREQUENCY passes CAL AMPTD ¨Cpasses with CAL link in place? CONFIDENCE TEST? ? ? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:50
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike its? 10dBm above the ref lvl. with 10 db ATTEN ? Gr Kees, Did you take a look at the 0hz feedthrough amplitude ¨C(left side of display) What value ?is it? Mike ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 20 March 2023 19:28
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi Mike, I've backup the constants ( paper) and used my marconi frequency?generator?to have the amptd NOT fail. After that the cal signal of the 8591E was used to do an amptd again and this time it succeeded. Still the lower end is terrible ( low amplitude ). I've done the service diag and? 1. the MAIN Coil driver?is much steeper and starts higher at the -20dbm horizontal line? The rest has the same picture as shown in the?8590-90316 manual. So according to the manual it's in the A7 board. does somebody have a spare will to sell ? Hi ?in your case ?from 238-247 if you haven¡¯t done it already? ..201 onwards? ?backing up correction constants ? One thing to check is the level of your LO feedthrough amplitude ?..the signal at 0hz on the left hand edge of the display Do frequency 0hz? span 1mhz¡ and see what the level of the LO is? --good ones are around -10db or better. ? By the way you¡¯re 8591? is a bit different on the front end than the 8590e series , yours is more prone to mixer failure but can be fixed . Lots of info on you tube ? Regards Mike g4wam ? ? ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 17:47
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ?
got it and will start reading.?
Any recommendations about what paragraph? ? You need 08590-90316? from? 2001 8590 series Service Guide ? Are large tome but worth downloading or buying ¸é±ð²µ²¹°ù»å¡¯²õ Mike g4wam ? ? From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 18 March 2023 14:41
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? Hi, Are we talking about the user manual 08590-90301, because there is not much cal data in it other than the normal stuff. I also have the installation, verification & Operation manual. Or are there other manual I need?
|
Re: HP 312A wave analyser
Good job, Brad.
?
Kr-85 depletion makes the lamp slow to ignite when it¡¯s in the dark, but AFAIK it doesn¡¯t increase the strike voltage.
OTOH, strike voltage does increase as the lamp is used, due to (I think) electrode material adsorbing or contaminating the gas.
Both processes are in play here.
Neon lamps manufactured recently are made without dark-effect-reducing radioactives.
I¡¯d try one anyway since you can get one quicker than you can engineer a LED retrofit.
?
Dave Wise
?
Sent from for Windows
?
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Show quoted text
From: David Holland
Sent: Tuesday, March 21, 2023 5:39 AM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 312A wave analyser
?
10 years (half life of the Krypton 85 they sometimes stick in neon bulbs, depending on the bulb specification.)
?
I have finally found the problem with the display on my 312A, on the MHZ range nixie, the 2nd from the first LHS, the neon that drives the photo conductor is flickering.
How many hours, or years, of operation does it take before the neon strike voltage point begins to degrade? I may have to start looking at LED substitutes, which I remember being discussed in a previous thread, and clean the range selector switch with de-oxit
? ? ? ? ? ? ? ? ? ? ? ? ? ? Regards Brad?
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Re: Shorted large filter cap - don't they normally go open?
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