Re: low amplitude readings below 10MHz on a 8591E
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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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