[Laser] Optimizing sound card modes for optical communication

[Art]

GPS time sync'ing is not nearly as expensive as it used to be.

If you use the NMEA output on a consumer grade GPS, you can get 
accuracy of 100 milliseconds.

For 50 nS accuracy, you need a known good gps module with a 1 PPS output.

Expensive Oncore timing GPS units are selling on ebay for $30 to $45. 
Although they have solid performance, many of the OEM timing modules 
are MUCH cheaper and just as accurate.

My Superstar II GPS board cost me $4. on ebay and I wish I had bought 
more of them, I'm so glad I didn't buy the higher priced Oncore units.

GPS timing is not nearly as expensive as it used to be and shouldn't 
deter anyone who wants to use it for communications.

More can be done with less, forsure!!! But, let's not lose sight of 
the benefits of accurate timing because it used to be expensive. Most 
of the accurate timing boards available today are pulls from working 
cellular sites. There's nothing wrong with them, and newer units are 
not necessarily any more accurate.

Regards,

Art


>Still, I think there is a lot more  that can be done with less
>sophisticated technology.  ( Perhaps I see too  many dollar signs 
>when I think of
>precision gps clocks.