[time-nuts] IRIG B

Hal Murray hmurray at megapathdsl.net
Tue May 25 19:00:07 UTC 2010

> For full send / receive in hardware it looks like a "grab a FPGA and codec"
> sort of thing. Might be able to do it with a micro depending on the
> performance level.  

It doesn't take a lot of CPU.

I have a 433 MHz AMD Geode (i386 clone) running ntpd's IRIG decoder.  Top 
says the CPU usage bounces around a lot.  Typical large samples are 2.3%.  
Round that up and we are talking 20 MHz.  It would be fun to get it running 
an an ARM and see how slow it could go.  (Or pick your favorite embedded CPU.)

These are my opinions, not necessarily my employer's.  I hate spam.

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