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Occulus, Thanks. Yahoo changed the interface so that it doesn't show unread messages in the SPAM bin :-( As a consequence I've been forgetting to check and empty it as I used to do every day. I do

Atomic references are in general, short lived. Cs beam's run out of vacuum, or out of Cs (some debate about that!). Rb references plate out the Rb metal on the lamp's glass bulb, and get to a point

I fully agree to Ed Breya. Your Rb standard very probably is not locked, 17ppm off is a typical sign for that. All such OCXOs (10544 or 10811) can never be out that far, if they are operating

Avoid IKEA. Much of their furniture is hollow on the inside, especially the worktop desk surfaces. El Wife found that out painfully when drilling... With best regards Tam HANNA Enjoy electronics? Join

Thanks, Jeremy,? Sean, Mine has C61 as well and it's no different from non-C61 version visually or in performance. Leo

The rubidium should be the most accurate of the bunch, except for the GPSDO. The method I have used is similar to the X-Y lissajous, but I use A, B ch, with B ch trig on a 100+MHz o-scope. Show both

Hello, Tek 577 plus Stinkely Consumer Edition 577. (around 1 grand, probably 400 bux or so) Tek 577 plus Stinkely 577. (around 1 grand, probably 1k2 bux or so) Tam With best regards Tam HANNA Enjoy

JF, Thank you for sending the documents. I have uploaded them here: /g/HP-Agilent-Keysight-equipment/files/Above%2010000/70000%20to%20%2079999/70000%20MMS The interface specification

I should add that the Rb would have to be assumed working properly - if it's a used, questionable one, then you need to make sure it's OK, evidenced, by a "lock" indication a while after powering up -

The simple answer is that none of the units are right, and all of them are just fine. You need to study up in the manuals on how the instruments work, what the reference frequencies do, the difference

[email protected]> wrote: Unlikely that you could set an OCXO 170 Hz out. The OCXO in my 8566B was 76 Hz out compared to my Trimble GPSDO. The closest I could get it was 70 Hz out. I found a NOS

One suggestion.? Compare to WWV and you will get your answer immediately. Bob

Since the SA and the two counters are not primary standards, someone down the line has adjusted them.? They all agree with one another but I'd vote for trusting the standard.? Align the counters and

...whoops hit reply too quick! To continue, the frequency reference appears like it needs to be checked. Bob's suggestion of using your o-scope in X-Y mode is a good place to start. Sean

Hi Terry, I had to read your question over several times to make sure I understood what you're asking. Please correct me if I'm wrong. It seems like you are measuring the rubidium standard with the

What I do is take the 10 MHz output from the counter time base (rear of unit) and compare to the rubidium 10 MHz signal on an oscilloscope X-Y display.? I adjust the counter time base to get the

I've tried to email the OP multiple times with questions about his rapidly burgeoning lab setup, but they never get answered. Overactive spam filter? Sean

Uhh, check your own spam bin, Sparky. ;) I replied to that email, 4/24 12:05AM. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

I have two of these units, one has the oven the other does not.? The two units do not read exactly the same value when fed with a signal from a 10MHz FE-5680A, rubidium frequency standard.? I am

Reg, I'm a bit confused. Are you talking about curve tracers (Tek speak) or semiconductor parameter analyzers (HP speak)? Or are you talking about fittings for a network analyzer? HP did make at least