[time-nuts] 9390-55108 IRIG

[Rob Kimberley]

Mark,

What is your ref clock driver 6 expecting to see?

IRIG-B can be in a modulated or un-modulated form (Datum called this DC
code)

The DC code was usually TTL compatible PWM and the IRIG-B would be 3V pk-pk
AM. Marker 8 cycles, "1" 5 cycles and "0" 2 cycles wide. Spaces 1V pk-pk.

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark C. Stephens
Sent: 09 August 2013 12:16
To: time-nuts at febo.com
Subject: [time-nuts] 9390-55108 IRIG

I am trying to get a Datum 9390-55108 to work with NTPD using refclock
driver 6.
So far I have been unsuccessful.
The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude
pulses) I can't get it to work with NTPD.
Unless of course, my NTPD version is broken!

Does anyone have information on these old type of 9390 that suggests the
IRIG standard they output?


--marki
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