Yes, very easy: 1) calibrate the internal 100MHz vectron OCXO using a small screwdriver, this is not really critical though as the unit does not really function as a frequency counter. 2) Calibrate the power supplies for proper voltages if necessary with same screwdriver, I found that is really not necessary usually 3) Auto-calibrate all the timing circuits using the built-in calibration feature and two external SMA cables, and two SMA shorts. The button to do that is on the front panel, and the unit does not have to be opened for this. You can also use their VISI application to do some more intensive long-term-averaging calibrations that are started via GPIB commands. There are user/service manuals floating around the web. Item 3) above is really the only thing that needs to be done from time to time I think. bye, Said In a message dated 10/2/2012 12:30:34 Pacific Daylight Time, [email protected] writes:
Are these easily calibrated? I contacted Wavecrest earlier today and they want $750 for the annual calibration. Not exactly 'hobby' friendly :-) jerry -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Said Jackson Sent: Tuesday, October 02, 2012 9:06 AM To: Discussion of precise time and frequency measurement Cc: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Best counter setting for ADEV? There are two on ebay now, $600 and $700... Buy it now.. I would ask the seller to connect the 100MHz ref output to both inputs one at a time and to measure jitter to make sure they work before buying though.. Dts-2075 recommended due to higher performance. On Oct 2, 2012, at 5:49, Azelio Boriani <[email protected]> wrote: > Wavecrest DTS for $600? Interesting... > > On Tue, Oct 2, 2012 at 2:43 PM, Adrian <[email protected]> wrote: > >> Timeok schrieb: >> >> test using HP53123A: >>> The pink line is the noise floor using the TI mode The blue line is >>> the noise floor using the Frequency mode (gate 2 sec) The other two >>> line are the same oscillator, an HP105B tested with both the modes. >>> As you can see the range between 1 and 200 sec is "totally >>> compromised" by the system noise floor using the TI method. >>> The approximation using the freq mode can be anyway usefull to make >>> a comparatinon between two source. >>> I suppose to have right measurements, without any restriction we >>> have to use the Timepod or other high level instruments than this >>> kind of counters. >>> >>> Luciano >>> >> >> Hi Luciano, >> >> interesting. So, the 53132A gains a lot more by this method than my 53131A. >> As Magnus pointed to, there might be pitfalls. So, it would be >> interesting to have comparative measurements from a non questionable test setup. >> >> In the meantime I tried a Tracor 527A which greatly improved the >> dynamic range, but appears to suffer from serious instability that >> might or might not be normal. >> >> Adrian >> >> >> >> ______________________________**_________________ >> time-nuts mailing list -- [email protected] To unsubscribe, go to >> https://www.febo.com/cgi-bin/** >> mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listi >> nfo/time-nuts> >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
