Hi
The one that I *always* forget:
It has a fan. Who knows where it’s been. Pop the top and clean out any dust
packed into the inside of the beast.
It’s very easy to get used to gear that’s been in clean environments and get
blind sided by the one that lived on the planet dust world.
Bob
>
David,
Do download the manual. Consider getting the hardprint manual.
The minumum you can expect of a seller is that they power the unit on,
and it should not show an error on start-up.
You can try to ask for them to do the performance check in the manual.
If the frequency measure is somewhat
Hi
>From what I’ve seen, many 620’s that have been sitting for a few years will
>not operate until the calibration procedure is run. They drift far enough out
>that they pitch errors trying to do simple things. Let the beast warm up for
>an hour and run the cal as soon as you get a used one.
Hi
If I follow your hint:
I set the 620 up for a 1 second gate and then I ask for an average of 1,000
readings. This takes 1,000 seconds?
Bob
> On Nov 21, 2014, at 9:32 PM, Brooke Clarke wrote:
>
> Hi David:
>
> I like it. Traded an HP 53132 (user hostile menu system, an the 12 digits
>
Hi Bob:
I agree with you. But the chapter is a easy way to check your new counter
when it arrived, and it's not only a calibration of just self test, it's
testing counter's performance on some level.
Regards.
Hui Zhang
At 2014-11-22 10:22:53, "Bob Camp" wrote:
>Hi
>
>Probably the
Hi David:
I like it. Traded an HP 53132 (user hostile menu system, an the 12 digits per second applies only to frequency, not
time) for it.
http://www.prc68.com/I/TandFTE.shtml#SR620
Fast precision measurement ( 1ps, 12 digits/sec) hint:
http://www.prc68.com/I/FTS4060.shtml#SR620Fast
Mail_A
Hi
Probably the best information out there on setting up a SR620 is buried in the
archives of this list back a few years. The back and forth required on some of
the adjustments is far from obvious. You do need to start from the manual and
get it as far as the manual will allow. You then go into
The SR620's manual is perfect, there is a whole chapter has detail information
of performance test. You can use that way for check the counter's condition.
Hui Zhang
At 2014-11-22 07:51:41, "Dr. David Kirkby (Kirkby Microwave Ltd)"
wrote:
>After regrettably selling my 537
Hi
The counter has a fairly extensive auto-cal / auto test built into it. Simply
looping the output back to the input is about all the setup needed. Checking
the calibration on the OCXO is the only thing that takes external gear.
Past that, yes there are a variety of calibration settings and p
After regrettably selling my 5370B a few years ago, I decided to look for a
used SR620.
Are there any particular issues with these that could be tested by the
seller prior to shipping it? I have not downloaded the manual yet, but I
assume there's a basic test in there - probably similar to that in
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