[time-nuts] AC Connector On HP 5061B
dforbes at dakotacom.net
Fri Oct 3 15:26:40 EDT 2008
> Tom Van Baak wrote:
>>> On the DA you will want to ensure all your output cables are of
>>> identical length as this will ensure that all signals are in phase at
>>> the timebase input(s). It's a small thing really a fraction of a
>>> picosecond but it's there and easily compensated for.
>> When does the phase of the timebase input mean anything?
>> Most test equipment is happy to have a stable external frequency
>> input; the phase is immaterial, no? Can someone give me an
>> example when relative phase among various random pieces of
>> test equipment is important?
> Hi Tom,
> Your absolutely right. The only two places that I can think of, off hand, would
> be televison and RADAR (systems with multiple terminals).
A counterexample would be a sampling system, in which it is required that the
sample clock be free-running relative to the signal clock. Otherwise all samples
will be at the same few points in the input waveform!
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