Keithley 236 firmware version A10
Hi, ? All the instruments in my lab are mainly HP/Agilent/Keysight, and two from tektronix, but now I have two Keithley sources, a 236 and a 238 functional received very recently. I was able to find the A10 firmware version for the 238, but I'm still looking for the A10 firmware for the 236, I know it exists but can't find it...does anyone have any information where to find this firmware. ? -Yves
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Re: HP8920A display onto computer monitor
The SimmConn Labs LCD replacement display does a nice job, although may be more than some want to spend. As I recall, it can bring out a VGA port as an option. ? Also, I have a CRT display removed from my 8920A which is in very good condition, as I only removed it to get the LCD; the display was working fine when removed about a year ago. Can be had for whatever it costs to ship in the US. ? Tom, N8ZM ?
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From: [email protected] <[email protected]> On Behalf Of RFI-EMI-GUY
Sent: Tuesday, May 31, 2022 3:14 PM
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP8920A display onto computer monitor? That youtube video is essential to anyone wanting to use the Sony.? I thought the resolution looked pretty good.
There are a few different models of the DSC-1024. I wonder which would be the best for use with the HP98XX series?
On Tue, May 31, 2022 at 01:35 PM, W6KX wrote: Using the DSC-1024HD yields just O.K. image sharpness.? Lots of hardware but the below youtube method works for viewing and acquiring.
I use GP-IB for capturing and printing the display image.
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Re: HP8920A display onto computer monitor
Looks like at least one enclosure available. I would prefer metal as I have a enough RF floating around.
GBS-8200 CGA/EGA/YUV to VGA Video Converter Board Case
https://corei64.com/shop/index.php?route=product/product&product_id=71
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Re: HP8920A display onto computer monitor
There is more info on the 8920 group
/g/HP8924-Family-Spectrum-Analyzers/topics
I've used both Gonbes 8200 (8220 is same but 2 VGA outputs) + LM1881, the Sont DSC104 and a professional scan converter. The Gonbes is better than the Sony but all are acceptable. One thing to watch is matching the VGA monitor to the converter output. If the output is standard VGA a higher resolution monitor can actually give a worse picture. An older monitor with matching native resolution works best.
Robert G8RPI.
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Re: HP8920A display onto computer monitor
There is no why spend so much money on that
Enviado do meu Tele-Movel Em ter, 31 de mai de 2022 16:14, RFI-EMI-GUY < rhyolite@...> escreveu:
That youtube video is essential to anyone wanting to use the Sony.? I thought the resolution looked pretty good.
There are a few different models of the DSC-1024. I wonder which would be the best for use with the HP98XX series?
On Tue, May 31, 2022 at 01:35 PM, W6KX wrote:
Using the DSC-1024HD yields just O.K. image sharpness.? Lots of hardware but the below youtube method works for viewing and acquiring.
I use GP-IB for capturing and printing the display image.
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Re: E4407B strange peak shapes at low RBW
Do you mean the filters on A3 IF Assembly?
Aren't those supposed to self-calibrate with the Auto-align ?
Is there a procedure in a manual that i've missed?
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Re: HP8920A display onto computer monitor
That youtube video is essential to anyone wanting to use the Sony.? I thought the resolution looked pretty good.
There are a few different models of the DSC-1024. I wonder which would be the best for use with the HP98XX series?
toggle quoted message
Show quoted text
On Tue, May 31, 2022 at 01:35 PM, W6KX wrote:
Using the DSC-1024HD yields just O.K. image sharpness.? Lots of hardware but the below youtube method works for viewing and acquiring.
I use GP-IB for capturing and printing the display image.
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yes I know it was a factory repair, bur I don't think I would have much luck trying to send it back to the factory Ha ha
Seriously It looks like it's not the correct board for my serial prefix (A4)
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Re: HP8920A display onto computer monitor
Using the DSC-1024HD yields just O.K. image sharpness.? Lots of hardware but the below youtube method works for viewing and acquiring.
I use GP-IB for capturing and printing the display image.
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Re: E4407B strange peak shapes at low RBW
You will need to go in and adjust your Xtal and LC filters.? Not hard, just a pain.
Richard
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Hello Everyone,
I am working on my E4407B and found that it has funny peak shape when I use low Resolution Bandwidths.
The shape is not collected into one peak, instead its smeared as in the pictures.
The bad shapes occur at RBW 300kHz, 100kHz. I don't think its there at 30kHz, but I could be wrong..
Anybody have any clue?
  
Best regards
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Thanks Lothar.
All understood.?? Diode based I understood and knew already.? After
all, some of the usage examples are for sweeping filters much as a
scalar analyser does things.
There seems to be even less info about the 85037 detectors than the
86200 series!?? But a common "feature" is a lower working frequency
bound of 10 MHz.
73.
??? Dave.
Re:-
The 86200 is a entirely different architecture as the regular HP
sensors , it is a diode based sensor that contains correction
constants inside a EEPROM , if I remember they were based on the
85037 detectors rather than regular HP sensors
--
Created on and sent from a Unix like PC running and using free and open source software:
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E4407B strange peak shapes at low RBW
Hello Everyone, I am working on my E4407B and found that it has funny peak shape when I use low Resolution Bandwidths. The shape is not collected into one peak, instead its smeared as in the pictures. The bad shapes occur at RBW 300kHz, 100kHz. I don't think its there at 30kHz, but I could be wrong.. Anybody have any clue?    Best regards
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Re: HP 8662A Power up - overvoltage shutdown
Hi Tony
?Use new Tantalums, but double the voltage ratings if at all possible,?
G Edmonds
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Re: HP8920A display onto computer monitor
Use a gbs8220 board with a sync separator lm1881.? Enviado do meu Tele-Movel
There is a video out on the back panel. The manual says that you need a 'multisync monitor'. This is a composite signal, but I don't know what the scan frequencies are. There are some composite lcd monitors for CCTV that work on several standards, but I haven't tried them yet. I have the 8922M which is similar and I also want a larger display. It would also be nice to be able to convert the video into a printable graphic.
I wonder if anyone has came up with a way to get the
HP8920A to display to a standalone computer monitor
and can you tell me what I need and how to do it.
All help is greatly appreciated, thanks.
Fred
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Re: HP8920A display onto computer monitor
There is a video out on the back panel. The manual says that you need a 'multisync monitor'. This is a composite signal, but I don't know what the scan frequencies are. There are some composite lcd monitors for CCTV that work on several standards, but I haven't tried them yet. I have the 8922M which is similar and I also want a larger display. It would also be nice to be able to convert the video into a printable graphic.
I wonder if anyone has came up with a way to get the
HP8920A to display to a standalone computer monitor
and can you tell me what I need and how to do it.
All help is greatly appreciated, thanks.
Fred
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Re: HP 8662A Power up - overvoltage shutdown
Gerald,
What do you recommend replacing them with - new tantalums?
(It would be a long weekend!)
thanks
Tony
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HP8920A display onto computer monitor
I wonder if anyone has came up with a way to get the
HP8920A to display to a standalone computer monitor
and can you tell me what I need and how to do it.
All help is greatly appreciated, thanks.
Fred
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Re: HP 8116A woes with E42 error
Thanks for the help fellas. Really appreciate it. Will target Q502 first and let ya know how it goes. Probably won't be until Friday or next weekend before I can get after it. Plus not sure if I have a PNP for replacement. Will have to look.
Will keep you updated.
Thanks,
David
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Re: HP 8662A Power up - overvoltage shutdown
I recommend another weekend and replace all tear drop tantalums, it will happen again and again over time if you do not remove all.
Regards
Gerald
VK3GM
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Re: HP 8662A Power up - overvoltage shutdown
WB8TSL:
.... The 8663 supply is pretty much the same.
The 20 V reg is pretty simple and can be traced out if needed. But check that the 20 V is not shorted to ground. The smoke makes me think someplace in the unit a tantalum has turned very black.
The supply senses current and does limit.?
Good luck
That helped, my 8662A works again. It did cost me most of the weekend. Some
50 screws are still to be re-inserted and my fingertips are sore because of the
many sharp edges on the SMCs.
It wasn't the power supply. It was one of these light-blue tantalums on A4A3.
I could not find the A4A3 drawing. In the 8663A this is something unrelated.
I wanted to see the source of the black smoke but could not find it, although
I opened all the plug-ins. The shorted tantalum looked completely innocent.
I Widlarized it carefully.
In one of the x reference lists, the linear regulators were translated as CA3020,
a double long tail pair. It is LM204 / LM205.
As a side effect, this 0-160MHz-320MHz-480MHz-bug is gone. No idea why.
I also replaced the incontinent NiCd battery block. It is the same type of
block that used to be in my HP-35 in a previous life. For the moment,
these are Eneloops until I get NiCds. Those are quite rare here now.
I also used a new battery holder.
Thanks to all and 73,
Gerhard DK4XP
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RFI-EMI-GUY
Alexandre Souza
Richard
Michael A. Terrell