[time-nuts] Cheap GPSDO's

>>> For more money, yixunhk has some nicely packaged units and AFAIK he has a >>> good reputation. BTW I have a '58503A' from him. It did and does (a year later) still work, although it took me a while to get it going. But it was a bit iffy - obviously in a re-made case and the eBay images

Re: [time-nuts] Calibration procedures - what is normal?

On Fri, Feb 12, 2016 at 3:43 PM, Richard (Rick) Karlquist wrote: > I left Agilent just before the split, but I don't know > anyone there who liked that name. Or the logo :-) Another recent name change (acquisition) that is even worse is Aeroflex to Cobham. I realize that

Re: [time-nuts] Calibration procedures - what is normal?

The consensus seems to be that I was expecting more than I should have. That's what I get for reading service manuals :-) Other than the confusion over what I was expecting, I can't fault the cal lab I sent the meter to. They are charging me a hobbyist-friendly price and aren't going to charge me

[time-nuts] Seeking HP 3561A schematic diagrams

I'm helping a colleague resurrect a hard-luck HP 3048A phase noise measurement system. In particular, he asked me to help get the 3561A dynamic signal analyzer working again. I downloaded Volume 1 of the service manual from Keysight, which contains Sections I through VI but does not contain

Re: [time-nuts] Calibration procedures - what is normal?

Joe I will believe they only do that procedure in a real repair. I had to do the same thing on a tek 2465b scope. O man what a complete pain in the rear and literally 8+ hours of work. So I can fully appreciate the reality that a Calibration is a check and trim for accuracy. Most likely an hour or

Re: [time-nuts] Calibration procedures - what is normal?

'Normal' calibration is a performance check and adjustments as required Performance checks are applying stimulus and checking instrument response is within the acceptable range. A Full calibration is adjust each parameter to as close as practicable to ideal value and may include new cal

Re: [time-nuts] Calibration procedures - what is normal?

On 2/12/2016 12:14 PM, Joseph Gray wrote: I sent my HP 3457A in for cal. I should be getting it back next week. I won't mention where I sent it, but it wasn't Keysight (I don't like that name). I recently changed the SRAM battery and purposely did not I left Agilent just before the split, but

[time-nuts] Calibration procedures - what is normal?

I sent my HP 3457A in for cal. I should be getting it back next week. I won't mention where I sent it, but it wasn't Keysight (I don't like that name). I recently changed the SRAM battery and purposely did not save the cal constants. I bought the meter second hand and it wasn't in spec when I

[time-nuts] HP 10811

Warren, What is the purpose of "Unseal the internal tuning nut by loosing it ~ 1/2 turn"? And which internal tuning nut are you referring to? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Seeking HP 3561A schematic diagrams

Any 3561A will work. Rob NC0B -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: Friday, February 12, 2016 12:28 PM To: TimeNuts Subject: [time-nuts] Seeking HP 3561A schematic diagrams I'm helping a colleague resurrect a

Re: [time-nuts] Seeking HP 3561A schematic diagrams

On 2/12/2016 11:28 AM, Charles Steinmetz wrote: I'm helping a colleague resurrect a hard-luck HP 3048A phase noise measurement system. In particular, he asked me to help get the 3561A dynamic signal analyzer working again. I downloaded Volume 1 of the service manual from Keysight, which

Re: [time-nuts] Calibration procedures - what is normal?

Generally, whenever I've had a non manufacturer 'calibration' it's been a certification service that tells you your equipment is within spec and gives you the variances and probability of uncertainty, a pass/fail test. Where equipment was out of spec then any service to bring it within spec was

Re: [time-nuts] Calibration procedures - what is normal?

On 12 Feb 2016 21:12, "Joseph Gray" wrote: > > I sent my HP 3457A in for cal. I should be getting it back next week. > I won't mention where I sent it, but it wasn't Keysight (I don't like > that name). I recently changed the SRAM battery and purposely did not > save the cal

Re: [time-nuts] Seeking HP 3561A schematic diagrams

Volume 2 actually contains Section VII (250 pages) with schematics. I bought a reasonably good scan, including oversized fold outs, at Qservice in Greece for 25 dollars (ebay item 380066695055 ). For fairness to the seller,I donì't offer to send you a copy. If I remember, it is possible to save