[time-nuts] Once again about counter calibration
Brent Gordon
time-nuts at adobe-labs.com
Sat Apr 25 02:36:55 UTC 2015
Just feed the PPS into the scope trigger on step 2.
The low repetition rate on the PPS would make this difficult on an
analog scope; on a digital scope it is easy. You can use any
sub-harmonic that is less than or equal the counter reference frequency
(10 MHz).
Brent
On 4/24/2015 3:45 PM, d0ct0r 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 !
>
>
More information about the Time-nuts_lists.febo.com
mailing list