[time-nuts] GPSDO using 100Hz

[Mike Monett]

Hi,

Sorry, I don't know how to reply to a post using the digest. But my
question is if 100Hz or 10KHz are available from a GPS unit, where do they
come from? Does that mean there is a 10MHz oscillator somewhere on the pcb
that is just divided down?

If so, then adding another PLL loop to control an external 10MHz crystal
will just add additional noise, jitter, variable phase offset, etc.

If there is already a 10MHz oscillator, wouldn't it be simpler to add a
buffer like paralleled sections of a 74AC04 to the source, and drive a 50
ohm coax directly?

Regards,

Mike Monett