[time-nuts] Sound Cards for locking to GPSDO 10 MHz references

Alberto di Bene dibene at usa.net
Tue Jun 2 13:51:27 EDT 2009

J.D. Bakker wrote:
> You could always transform this from a hardware problem to a software 
> problem. Take the output of your GPSDO, divide it down to somewhere 
> inside the audio band, feed it to a spare input on your USB sound 
> card and have software track this reference and correct the received 
> signal.
> JDB.

I am in complete agreement with this kind of solution. Sampling on the
second channel a reference signal of known value allows the software
to make a simple adjustment. No need to switch on the soldering iron...
Never do in hardware what can be done in software.... :-)

73  Alberto  I2PHD

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