Looking for Schematic: Marconi 2031 - Page 1
Forum section: electronics / testgear

author: Larry F
author_rank: Newbie
timestamp: May 28, 2014, 07:18:33 pm
content: I picked up a used 2031 sig gen. I've found the operating manual online but I haven't found the schematic anywhere. I like to collect all the information in case I have to make repairs in the future. If anyone can help, please let me know.

author: KJDS
author_rank: Super Contributor
timestamp: May 28, 2014, 08:05:57 pm
content: I suspect that one has never been released. The fractional N synth in there was proprietary, had a hatful of patents on it.There's some more info herehttp://www.aeroflex.com/ats/products/prodfiles/appnotes/890Iss2.pdf

author: Larry F
author_rank: Newbie
timestamp: May 28, 2014, 08:52:20 pm
content: That was my concern. Back in the day, Racal had their Kingphase fractional N, HP had one and I guess Marconi did too. Are the patents still in force on fractional N? I'm not sure why the rest of the synthesizer would be proprietary though, this many years later. I'm working on a 2023A right now and the documentation on that is excellent. I was hoping to find something similar on the 2031.

author: G0HZU
author_rank: Super Contributor
timestamp: May 28, 2014, 09:33:59 pm
content: Have you tried asking Aeroflex directly?

author: KK
author_rank: Regular Contributor
timestamp: July 29, 2014, 08:01:21 pm
content: Quote from: Larry F on May 28, 2014, 07:18:33 pmAny luck on getting the service manual? I am also in need of it.I've emailed Aeroflex directly and their West Coast USA distributors yesterday and am awaiting a response.The 2031 signal generator service manual is part # 46880/047My search through the web has so far turned up nothing.

author: KK
author_rank: Regular Contributor
timestamp: August 02, 2014, 02:16:13 pm
content: Heard back from Aeroflex. They want $400.00 USD for the service manual.I think that must be one amazing document.

author: WarSim
author_rank: Frequent Contributor
timestamp: August 02, 2014, 02:20:28 pm
content: Supply and demand

author: G0HZU
author_rank: Super Contributor
timestamp: August 02, 2014, 02:30:55 pm
content: Is that for a hard copy or pdf?They sent me the service manual for my 2024 free of charge in pdf format at a time when it wasn't freely available on the net.

author: KK
author_rank: Regular Contributor
timestamp: August 02, 2014, 02:46:41 pm
content: Quote from: G0HZU on August 02, 2014, 02:30:55 pmI haven't responded back yet, but will clarify if that pricing is for printed or electronic or either.I've already repaired my 2031 without it and read the EEPROM to get the unlock codes.I will ask if I can get it as PDF for less and perhaps at hobbyist pricing. I had to submit an export affidavit before I could even get a quote. They don't want the manual exported out of the US without control.

author: mij59
author_rank: Frequent Contributor
timestamp: August 02, 2014, 02:54:33 pm
content: Hi,Found the service manual on eBay.http://www.ebay.nl/itm/Marconi-IFR-Aeroflex-2030-2031-2032-scanned-Service-Manual-in-a-CD-/271564447615?pt=LH_DefaultDomain_186&hash=item3f3a809f7f&_uhb=1

author: KK
author_rank: Regular Contributor
timestamp: August 02, 2014, 03:22:54 pm
content: Quote from: mij59 on August 02, 2014, 02:54:33 pmThanks for that!Strange it never showed up in my ebay searches even under International.

author: KK
author_rank: Regular Contributor
timestamp: August 07, 2014, 04:10:46 am
content: The Aeroflex manual was printed only. No digital copy available, they say.The eBay seller (thanks immensely to mij59 for finding it) sold me a perfect digital copy. I doubt he scanned it himself, so the digital copy exists. And, I have it now.A couple of notes for those with this siggen. The EEPROM located on the topside processor board, a AT28C64B stores the calibration data, and importantly the UNLOCK codes to get into calibration and/or set clock etc.If you don't know the codes for your machine, pull this chip (it is socketed) and read it (the TL866 series is compatible). You will find these memory locations usefullevel 1 unlock code 0x0248level 2 unlock code 0x024cunit serial number 0x0260Data is in ASCII

author: LaurenceW
author_rank: Frequent Contributor
timestamp: October 24, 2014, 09:41:13 pm
content: I've just landed me a 2030, which all looks to be in good order. Far more modulation options than I will ever need! I don't have the Calibration procedure, and didn't realy want to run to a whole maintenance manual just for that. Does anyone have the Cal routines?By the way, I discovered that, on my instrument at least, the unlock codes 1,2 were 1234 and 123456, respectively!Screen is a bit wishy-washy, but I think it is probably as good as it ever was. Large dot matrix LCD screens in 1990, anyone?

author: EMUD
author_rank: Regular Contributor
timestamp: November 20, 2014, 04:26:59 am
content: Hello KK,I am just repairing my Marconi 2032 with a corrupted calibration EEPROM. I think you have analyzed the contents.Is it possible to get the complete bin file of the EEPROM (IC114) to check if I could restore the calibration datain my 2032 ?Best regards and thanksEMUD alias DB6RK from Germany

author: KK
author_rank: Regular Contributor
timestamp: January 03, 2015, 05:35:15 pm
content: Quote from: EMUD on November 20, 2014, 04:26:59 amHappy New Year!see attached

author: pudozh
author_rank: Newbie
timestamp: February 14, 2017, 10:15:37 am
content: Hii'm searching desperately the schematic diagram of Marconi 2031 . The attenuator was burnt by a WHF and now has a gap between -80 , -70 dbm ; all the rest works correctly.Can you help me?ThanksJoe