[time-nuts] Once again about counter calibration
time at patoka.org
Fri Apr 24 23:05:38 EDT 2015
Currently, 10 Mhz output connected to Linear LTC6957-3 to feed DDS and
MCU for another purpose. Of course I am able to reconfigure (physically
disconnect) it. But I am just curious if its an option to use only 1PPS
On , Bob Albert wrote:
> Why not use a T connector to patch the 10 MHz to two places at once?
> On Friday, April 24, 2015 5:06 PM, d0ct0r <time at patoka.org> wrote:
> The input: HP 5386A which I would like to calibrate, Well warmed
> Thunderbolt (1PPS only), 10 Mhz Datum OCXO (unknown accuracy), Rigol
> 1101E Oscilloscope.
> The goal is to calibrate counter to read the Datum OCXO.
> Reading the manual for 5386A, there is simple schema for calibration:
> 1. Connect HP 5386A 10Mhz OUTPUT to Oscilloscope
> 2. Connect Frequency Standard to Ext. Trigger on Oscilloscope
> 3. Adjust the frequency on 5386A TCXO for minimum sideways movement of
> 10 Mhz signal
> However, my Trimble TB 10Mhz output is currently in use. I have only
> 1PPS signal available. The HP manual do not mention what exactly
> frequency needs to be on "Frequency Standard" connected to Ext.
> Is there any method/option I could apply to calibrate HP counter ?
> Thanks !
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