Re: low amplitude readings below 10MHz on a 8591E
I agree with these comments, but watch the dc blast concept ??8591e will take some DC but not the 8590e series. ? Mike ? ? ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Ed Breya via groups.io
Sent: 23 March 2023 23:01
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E ? I'd suggest that in any SA case where the response falls off greatly toward the low end, that you have a bad/intermittent connection in the RF cabling or parts. If anything goes bad and opens up, you lose the DC/LF content, while there's still enough capacitance in place (just due to proximity - that's all it takes) to carry the RF at the upper end. The basic amplitude versus frequency envelope you see is a high-pass filter of the residual capacitance against the 50 ohms system Z.
The badness can be anywhere, in any connection or component. The most likely though, tend to be mechanically related, like contacts inside connectors, and switches such as in RF relays and attenuators, for instance. Sometimes you can cure or at least diagnose "switch" type problems by exercising them lots of times through the possible states. A good strong input signal can help too, to clean contacts. You can use any signal that's well below the maxim input power rating - even a FG or DC, if your RF sources don't have enough juice. In the case of step attenuators especially, you may need plenty of power to effectively hit the deepest/furthest back pad sections.
The recent observation that it seemed to be working again for no particular reason, then failed again, but slightly differently, is highly indicative of a marginal contact of some sort. You can expect such variable results until you find the true cause. Good luck.
Ed
|
Re: low amplitude readings below 10MHz on a 8591E
Chuck,
Good to know someone has my 6
Regards
Mike
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Chuck Harris Sent: 23 March 2023 22:18 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] low amplitude readings below 10MHz on a 8591E Hi Mike, I have zero experience with the 859XE, and am only looking over your shoulder, so to speak. It is rare to see a backup battery installed where no thought was given to how it was going to be replaced at some point in the future. Your way worked, which is pretty much all that matters. -Chuck Harris On Thu, 23 Mar 2023 18:56:01 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: 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
-----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
Looks like an attenuator problem now¡ªyou can test it with a power supply? -YouTube again ? Mike ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 21:08
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 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 ? 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.? ? 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. ? 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 : ?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. 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.? 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, The link is needed to pass the CAL for various reasons, the 600mhz and 10Mhz are tested as well as the attenuator output and the YTO output. I also use my trusted Marconi 2019a ?-usually within ?1db or so of the HP8594e across its range.. The YTO is very strong but that¡¯s good, it should last a long time. My personal view is that you have an input attenuator problem? or? a cable fault! ? You need to do that 1mhz to 300Mhz test aging with a new cable and see what values you get. ? Remember that the 8591 e? has rather different front end than the 8690e series so worth getting a look at the block diagram ¨Cthey are on line to download. ? Regards Mike ? ? ? ? ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of KeesHofwegen
Sent: 23 March 2023 21:01
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] 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.? ? 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. ? 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 : ?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. 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.? 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: E4407B option AYX Fast Sweep Time Domain
Hi,
I worked on it today, and I found the fault: two op amps were defective.
I was able to test them out of circuit for confirmation.
The problem of not having a picture on the screen was mainly caused by the
fact that the DC voltage applied to the signal was not within the range of
the ADC AD9050, the 10 output bits of the ADC were all at logic 0.
I ordered the parts, but I'm not sure if there are other defective parts, I
will make this first replacement, I will see for the continuation.
I am not sure if the ADC is not damaged, removing these two circuits and
retesting the board, I saw noise on the screen because the voltages at the
ADC inputs are identical and in the normal range of the AD9050 component.
However, the noise had a high amplitude...I will be soon if there is still a
problem.
Thank you for responding.
Yves Tardif
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-----Message d'origine----- De?: [email protected]< [email protected]> De la part de Don Bitters via groups.io Envoy¨¦?: 23 mars 2023 17:56 ??: [email protected]Objet?: Re: [HP-Agilent-Keysight-equipment] E4407B option AYX Fast Sweep Time Domain Is there an intensity adjustment for the faster sweep times? The 8566 has such an adjustment on the video cards. Try cranking the intensity up for faster sweep times to see if the trace is visible, if yes then you have a fast sweep intensity problem. Don Bitters
|
Re: HP 8656B display issue
I would suspect an IC in the IF A3 video section. It sounds like a stuck bit. Part of the A3 section deals with the text and graphics. I believe that it is probably in the A3A1 ->A3A4 (video memory brd.). Check the ribbon cable connects to this A3 section, the traces on the A3 mother board. Do read the A3 section theory of operation, then read the individual A3 brd. that the section theory of operation points to. I think you will be able to isolate the problem board inside of 2 hrs., then localize to a circuit area. An oscilloscope will show TTL activity and proper levels on the data lines. Any levels other than +5V and 0V (or acceptable TTL levels) on data lines will be a problem.
Do check the power supply lines on each of the A3 section brds. as each brd. has filter caps on each brd. - tantalum in most cases. HP used a distributed filter cap approach to their power supply design.
Don Bitters
|
Re: low amplitude readings below 10MHz on a 8591E
I'd suggest that in any SA case where the response falls off greatly toward the low end, that you have a bad/intermittent connection in the RF cabling or parts. If anything goes bad and opens up, you lose the DC/LF content, while there's still enough capacitance in place (just due to proximity - that's all it takes) to carry the RF at the upper end. The basic amplitude versus frequency envelope you see is a high-pass filter of the residual capacitance against the 50 ohms system Z.
The badness can be anywhere, in any connection or component. The most likely though, tend to be mechanically related, like contacts inside connectors, and switches such as in RF relays and attenuators, for instance. Sometimes you can cure or at least diagnose "switch" type problems by exercising them lots of times through the possible states. A good strong input signal can help too, to clean contacts. You can use any signal that's well below the maxim input power rating - even a FG or DC, if your RF sources don't have enough juice. In the case of step attenuators especially, you may need plenty of power to effectively hit the deepest/furthest back pad sections.
The recent observation that it seemed to be working again for no particular reason, then failed again, but slightly differently, is highly indicative of a marginal contact of some sort. You can expect such variable results until you find the true cause. Good luck.
Ed
|
Re: low amplitude readings below 10MHz on a 8591E
Hi Mike, I have zero experience with the 859XE, and am only looking over your shoulder, so to speak. It is rare to see a backup battery installed where no thought was given to how it was going to be replaced at some point in the future. Your way worked, which is pretty much all that matters. -Chuck Harris On Thu, 23 Mar 2023 18:56:01 -0000 "Mike Lockley via groups.io" <mikelockley@...> wrote: 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
-----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: E4407B option AYX Fast Sweep Time Domain
Is there an intensity adjustment for the faster sweep times? The 8566 has such an adjustment on the video cards.
Try cranking the intensity up for faster sweep times to see if the trace is visible, if yes then you have a fast sweep intensity problem.
Don Bitters
|
It is a simple split DC power supply. There is a 1122A on Ebay for $99. Here is the Keysight information on the connector:
Part Number: 5060-0467
Part Description:NFTS Conn-Probe Pwr
Item Status: Not orderable, Contact Keysight for repair service
Item Type: Keysight Qualified Part
General Information:
This part is not available for direct sale but an instrument repair is orderable through our service center. Please contact Keysight to inquire about returning your instrument for repair.
Weight: 0.002 KG
Products using part 5060-0467
1122B
11758V
5335A
70820A
70820A-H10
70904A
71100C
71100P
71401C
71501C
84100EM
84110EM
84125A
84125B
84125C
8508A
85105A
85106D
85301B
8542E
85462A
8546A
8560E
8560EC
8560EL
8561E
8561EC
8562E
8562EC
8562EL
8563E
8563EC
8564EC
8565E
8565EC
8590L
8591C
8591E
8591EM
8593E
8593EM
8594E
8594EM
8595E
8595EM
8596E
8596EM
8760A-KH2
89441A
89441V
E4902B
E5501A
E5501B
E5503B
E5504B
N1960A
The NSN is: 5935-00-180-4186
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
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?
|
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
|
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?
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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?
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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
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-------- 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
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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
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-----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
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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
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Michael A. Terrell