jyelmgren <jyelmgren@...> added folder /8920AB Power Supply Information Schematic

Hi All,

Cleaned off the bench and took 83206A off the 8920B - Thought it would be a good idea to run the diagnostic programs that are on the system ROM - Unit passes power self-tests but when running RFDIAGS2 I'm getting errors during the Output section of the test program.

The first error is in the "Output Detector, Detector Caps" phase. The 4 tests check two caps, C419 & C418 both in and out of the circuit together and individually. I get the same result for every test indicating an actual Vdc of 0.038. The diagnostic suggests that the path is A25J55 to A25J56 - From poking around this seems to be W13, a semi-rigid short jumper.

The next set of errors is in the "Output Frequency Range, Loop Closed" phase. It shows a value across the frequency range of 0.038 to 0.041 and again suggests W13. Finally, there are errors in "Bandwidth Control" again pointing to W13.

From reading it seems that W13 is a bit of a known problem child but before opening the unit up and trying to gently clean it, I wanted to ask the group if this could be a false flag from removing the 83206A? Would they have removed that jumper in the expectation that the path would continue through the external 83206A?

Any comments, thoughts, or suggestions are appreciated.

Thanks,

TonyG

1. I used an old Thinkpad T20 that I've had since the late '90s (I think) - It has 2 PCMCIA slots on it
2. Upgraded to Win98SE - I had just MS-DOS 5 installed on it as I was using it for some R&S software that needed an NI GPIB-323
3. Previously I had purchased a flash memory card from eBay just for this - The card I bought was an IBM 2Mb Flash Card, part number 0934290 - I plugged it into the T20 and after the PCMCIA Card Services files were installed (with the requisite flashback to me filing a bug asking why this requires me to find my original CD again and it couldn't just be cached as part of the required files YMMV), the card was ready to go.
4. Installed the MCE app that JB suggested - I needed to use low memory launch - It's basically a command-line option that you pass to the app - The app installed placed two shortcuts on the desktop and when the Low Memory Value one worked I didn't bother to look into it further.
5. I grabbed the binary file for the 11807E from the files section here -?/g/HP8924-Family-Spectrum-Analyzers/files/1Separate%20miscellaneous%20files/11807Eopt100.bin
6. Dragging and dropping this onto the MCE let the T20 write the image to the card
7. Shutting down and transferring the card to the 8920B enabled me to use it there
8. On the 8920B, hit the TESTS button and select CARD as the program location, find RF TOOLS in the list of apps and execute it - Warning, it took the better part of 2 ice ages for it to launch on the 8920B but I might just be impatient - It ended up ranging without problems.

开云体育

开云体育

I have only managed to get the RF TOOLS card to work by copying an image of the card (.BIN file) or by loading into a 8920B and then copying back to a RAM card.

As far as I know the 8920B writes to cards in LIF format. Some, maybe all firmware versions can read/write DOS RAM cards. NONE can write to FLASH cards. Obviously Flash cards are preferable because RAM cards lose their data easily

I cannot source EPSON cards for the 8920A and don't have an A to test them in if I did. I do have an EPSON connector. Some avionic equipment used the same card format for databases. Unfortunately they had the cards well locked down for copying due to the cost of the data.

Robert G8RPI.

Actually Robert - Don't worry I tried the software JB pointed me to and it works so I think I'm good on that.

My question now is that it seems the process accepts only 1 file to be written to the flash card, any pointers on how to go about assembling the files from the the RFTools folder here in the group, into a binary that can be written to the card?

Thanks,
TonyG