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| HP35665A Firware update |
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| KE5FX:
--- Quote from: greasemonkey on June 03, 2021, 09:36:18 pm --- --- Quote from: KE5FX on July 30, 2019, 10:07:00 am ---Does anyone else with a 35665A find that there's no difference between setting the Y units to V/rtHz versus V^2/Hz? :-BROKE On mine, the display shows dBV/rtHz regardless. The V^2s/Hz (ESD) function works, just not the V^2/Hz (PSD). --- End quote --- That is a sneaky one. Here it goes: [Trace Coord][LINEAR MAGNITUDE][Y UNITS][V/rtHz] BTW love your GPIB software. Thanks! --- End quote --- You're welcome. :-+ I'll have to look back at the issue I was having; it may be tough to recreate since the 35665A has been replaced by an 89440A. Seems that there were two separate functions that erroneously did the same thing. I'd like to think I didn't overlook Trace Coord->Linear Mag->Y Units, but it's hard to say at this point. |
| greasemonkey:
I must admit that my knowledge on the issue is severely limited. But it is a good chance to dig deeper into the theory. I could try a few things if you like. PM me. Another question. Were you ever able to print a screen directly from the 35665A to the 7470A plotter simulator? I still plot on a floppy and then transfer them on my PC. |
| mightyohm:
Can someone please post a copy of the firmware upgrade disks? I can't seem to find them online. Also, did we ever get a copy of the change list between firmware revisions? I have two 35665A's. One of them has FW A.01.07, and the other has FW A.01.11. The flash ICs are soldered to the memory board so unfortunately I don't think I can copy from one to the other (and also, who knows what other data, cal constants etc are stored in there). |
| Tomorokoshi:
--- Quote from: greasemonkey on June 05, 2021, 10:24:09 am ---I must admit that my knowledge on the issue is severely limited. But it is a good chance to dig deeper into the theory. I could try a few things if you like. PM me. Another question. Were you ever able to print a screen directly from the 35665A to the 7470A plotter simulator? I still plot on a floppy and then transfer them on my PC. --- End quote --- I was able to use 7470.exe to plot directly from the HP 35665A. Here are plots from the options and memory screens: https://www.eevblog.com/forum/repair/hewlett-packard-35665a-power-supply-repair/msg4121485/#msg4121485 I don't recall any particular trouble with it. |
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