[time-nuts] Leap Second results: cheap GPS/1PPS receivers

[Hal Murray]

time-nuts at febo.com said:
> I am missing something here.  How does one use a 1 PPS signal? I see how I
> can use a 1 MHz or 10 MHz for a time standard but the 1 PPS usage eludes
> me.  Unless the pulse is extremely sharp, a minor uncertainty in the shape
> or amplitude will have profound effects on the timing.

It's a digital signal, not a sine wave.  For a TBolt, it's 10 microseconds 
wide.

> I use an HP 5328A with the OCXO and wonder how I can improve its accuracy.

You can't feed it into the ext-osc input, but you can check the calibration 
by measuring the time between pulses.  If the measured time is longer than a 
second, your internal clock is running slow.


-- 
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