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Re: Scoping the Power Rails [8566B]
Good, so it sounds like your reference is fine. I would redo the test on the 10 MHz OUT next. If you still see that harmonic, it will narrow down at least one of the problems with this unit. If not,
By Matt Huszagh · #123276 ·
Re: Scoping the Power Rails [8566B]
Okay, now re-done. I was having issues with a dodgy patch-lead which I've now replaced with a known good one. Attaching direct to "INT" this time, with the switch still set to "INT" I'm seeing 10Mhz
By Jinxie · #123275 ·
Re: 8341B Issues 1992 firmware
Yes the lab 8340B does have the new CPU board ( same part#) So I opened the lid and swapped CPU boards , my 8341B works ok with the CPU board from the 8340B except the top frequency is 26GHz , the
By Lothar baier <Lothar@...> · #123274 ·
Re: HP200CD oscillator
But then it seems to me that it has been corrected in the latest edition of the manual. However, highest esteem and admiration for HP ! - Cheers Attilio
By Attilio · #123273 ·
Re: 8341B Issues 1992 firmware
Does the "lab" 8340B have the same CPU board as your "new" CPU? If not, how can putting the 92 FW on that board resolve anything? Are the PALS on the new CPU the same as the PALS on the old CPU
By Bruce · #123272 ·
Re: HP200CD oscillator
If you were familiar with them, it might have been tougher to make that mistake, but I recall a lot of confusion when solid state rectifiers first came out about which way they were to go in a circuit
By Tom via Metronet · #123271 ·
Re: ESG-3000A LCD replacement
I obtained a slightly newer than the ESG-3000 ESG about a year ago and the display was dark. When I got into it, the fluorescent lamp was working, but the silvering on the paper backing that reflects
By Tom via Metronet · #123270 ·
Re: 8341B Issues 1992 firmware
The board goes through the regular cycle when powered up the only difference is that the frequencies the unit comes up with are screwed up ! The problem is that I don¡¯t have any evidence that the
By Lothar baier <Lothar@...> · #123269 ·
Re: HP200CD oscillator
It would be a lot harder to make that mistake with a hollow state rectifier.? ;-)
By Jim Adney · #123268 ·
Re: ESG-3000A LCD replacement
My first question to you would be have you checked the backlighr and backlight inverter on the old LCD ? also on the replacement panel have you checked if the backlight used is the same kind ? Sent
By Lothar baier <Lothar@...> · #123267 ·
Agilent IntuiLink VNA for Excel 2016?
All: Has anyone been able to add the IntuiLink add on to Excel 2016?? Rich
By Rich Miller · #123266 ·
Re: ESG-3000A LCD replacement
Hello Manfred, Good luck. The difference in the FW1 and FW is the polarity of the contrast bias.? If you put in the FW1 in the older model it will blow the transistor that supplies the contrast
By Tom B · #123265 ·
Re: Scoping the Power Rails [8566B]
@Jim Adney Just re-doing all the tests as not happy with the methodology I'd previously used. Best hang fire on any observations for now until I can confirm my findings - or otherwise as the case may
By Jinxie · #123264 ·
Re: 8341B Issues 1992 firmware
When you had the new board running the newer software were any of the CPU LEDs lit ? What evidence do you have that the firmware on the new CPU is functional (This is a long shot as I believe the CPU
By Bruce · #123263 ·
Re: HP200CD oscillator
¡°The 1962 manual, with vacuum tube rectifiers, has the polarity correct, so the error oscillated¡± ? ¡­.. ¡°Seems like a pretty rookie mistake for HP¡±. As I understand it, HP were rookies in
By Sharp, David · #123262 ·
Re: Scoping the Power Rails [8566B]
Is that a 10 MHz signal with a first harmonic "bounce" in there? If so, then depending on where your counter triggered, it could be counted as either 10 MHz or 20 MHz. I'm pretty sure this is not what
By Jim Adney · #123261 ·
Re: ESG-3000A LCD replacement
Hello Tom, i do have exactly the same problem, no jumpers on the motherboard and a DMF-51043NFU-FW1, that will not work. The original MDF-50562NFU-FW has stopped to work, so I need a new LCD. Did you
By Manfred Hund (DL2IAO) · #123260 ·
Re: Low EMI lighting for labs and work areas
Lamplight. Zero RF emission. Use something that uses mantles and the only emission you might have to worry with other than heat and light is whatever radiation comes from the thorium doping. (Tongue
By Matt Harris · #123259 ·
Re: Scoping the Power Rails [8566B]
Matt, Thanks for the info and diagrams. The BNC I posted the trace of is the one marked "10 Mhz Output" in the second diagram. I freely admit I do often forget to set the scope input for 50 ohms in
By Jinxie · #123258 ·
HP8566B Spectrum Analyser Check-Lights ON
Dear Group,? Problem with my HP8566B Spectrum Analyser - The Two Instrument Check-Lights are coming ON now and A17 Power Board Q4 Transistor (HP 8318) is getting Very Hot.Fuze F3 6 amps keeps
By MARC CHRISTIAN · #123257 ·
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