[time-nuts] Once again about counter calibration

d0ct0r time at patoka.org
Sat Apr 25 03:05:38 UTC 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 
for calibration.

Regards,
V.P.

On , Bob Albert wrote:
> Why not use a T connector to patch the 10 MHz to two places at once?
> 
> Bob
> 
>  On Friday, April 24, 2015 5:06 PM, d0ct0r <time at patoka.org> wrote:
> 
> Hello,
> 
> The input: HP 5386A which I would like to calibrate, Well warmed
> Tremble
> 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.
> Trigger.
> Is there any method/option I could apply to calibrate HP counter ?
> 
> Thanks !
> 
> --
> WBW,
> 
> V.P.
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-- 
WBW,

V.P.



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