[time-nuts] PRS-10 findings
Henk ten Pierick
henk at deriesp.demon.nl
Wed May 30 16:22:36 EDT 2007
My hp53310 shows the same artifacts if the input frequency is nearly
the reference frequency. If I use the reference as input frequency
the noise is lower. When I adjust the time/div to more than 2 times
the frame flyback time, I can see a disturbance at the fylback
interval with an amplitude of a few hundred ps. The behaviour is with
both internal and external reference. The hp53310 is the modulation
domain analyzer which forms the basis of the 53131/53132.
On May 30, 2007, at 21:43, SAIDJACK at aol.com wrote:
> In a message dated 5/30/2007 05:38:40 Pacific Daylight Time,
> pvince at theiet.org writes:
>> interference from an off-frequency signal. I hadn't bothered to
>> the counter to an external reference, and on measuring a Rubidium
>> source against its internal oscillator, got a reading about 1.4 x
>> 10^-9 high, which matched perfectly this 70-second period Locking
>> the counter to an external reference, this beating went away.
> Hi Peter,
> I was using the same PRS10 also as the counters' reference. Maybe
> not a good
> idea? I will try again with the internal ref, and my Cs as a ref.
> Glad you did see this as well, and fixed it!
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