On Wed, Nov 3, 2010 at 3:08 PM, jimlux <[email protected]> wrote: > Alexander Sack wrote: >> >> Hello Time-Nuts: >> >> Has anyone used a Endace TDS 24 unit before? I have someone who has >> one but we have no user manual. Any pointers? >> >> And what is IRIG-B output suppose to look like...this unit seems to >> give off two distinct outputs....one is a 3.3V to 1.5V sweep, the >> other is just a 3.3V pulse (I assume that 1PPS). >> > > Irig B will either be an amplitude modulated audio signal or the pulses. > Mark (high amplitude, logic 1) to Space (low amplitude) should be 10:3 with > 3:1-6:1 being the range . The carrier is some multiple of the pulse rate > (I've seen 1kHz pretty commonly) > > It could also be Manchester coded, but I've not seen that.. otoh, most of my > IRIG experience has been with unmodulated versions. > > IRIG B runs at 100 bits/second, with 1 second frames (i.e. 100 pulses/frame) > and the pulses are either 2 (zero),5 (one),or 8 ms (frame sync) long > > > All is revealed in IRIG Standard 200 ..google and ye shall find.
Thanks guys! -aps _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
