[time-nuts] NTP IRIG config help

Jim Kusznir jkusznir at gmail.com
Wed Mar 9 14:35:19 EST 2011

It has "Demodulated IRIG" as its main IRIG output, but it does have
one Modulated IRIG.  Others have told me I want the Modulated IRIG; I
honestly don't know what the differences are, and I haven't gotten out
a scope to see.


On Tue, Mar 8, 2011 at 4:25 AM, Rob Kimberley <rk at timing-consultants.com> wrote:
> I looked at the data sheet of the sel-2407 and interestingly it states
> "demodulated" IRIG-B, which seems a bit odd. Either it's a modulated code
> i.e. a sinusoidal wave with amplitude modulation (usually about 3:1), or
> it's what we call a DC code i.e pulse width data stream not superimposed on
> the 1 KHz carrier.
> Rob Kimberley
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