I have a Racal-Dana 1992 Nanosecond Universal Counter that includes
a phase measuring function. I also have a GPIB interface and wrote some
C code to log these readings which can be displayed with gnuplot.
The phase should be measured for a very long time - days perhaps. The
ability
to record the phase over that period is useful because the Thunderbolt will
have considerable (compared to the Rb) short term variance.
You could use a scope. If the X and Y channels can hack 10 MHz you can do a
Lissajous pattern. Otherwise display one and trigger on the other.
The frequency should be within a fraction of one Hz before worrying
about the phase.
On 12/23/2011 03:32 PM, Mark C. Stephens wrote:
Hello Chuck, I noticed with interest you compared a thunderbolt to a
RB standard using phase lock.
I wonder how you measured the phase lock?
My thoughts would be to use an Oscilloscope but do you have another
method?
Many thanks, Mark
*Kind Regards,*
Mark Stephens
**
*Mark C Stephens* | Customer service engineer | Non-Stop Computer Ltd
(+61 2 9011 8186 | (+61 428 256 334 | +ma...@non-stop.com.au
<mailto:ma...@non-stop.com.au>
Non-Stop Computer PTY LTD
79 Devon St
North Epping
NSW 2121
Australia
Email: serv...@non-stop.com.au
--
Chuck Forsberg WA7KGX n2469r...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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