Chris & Co.,
The usual problem is overdriving the computer input.. Most IRIG devices
produce a modulated signal in the range 10 V P-P, which is far larger
than the line-in level. You might need an attenuator to produce in the
order of 1 V P-P. As Chris says, the best way is to monitor the line out
signal using the computer speaker. With a little practice, it is
possible to slowly increase the input level until the speaker changes
tone or becomes raspy. The bottom line is to monitor the AGC signal with
that trace and bracket the input signal so the AGC reads in the middle
of the range about 127.
Dave
Dave
Chris Albertson wrote:
On Fri, Apr 1, 2011 at 10:57 AM, Jim Kusznir <jkusz...@gmail.com> wrote:
Hello all:
I'm trying to set up a linux ntp server using IRIG as a time source,
from a SEL 2407 (http://www.selinc.com/sel-2407/). Unfortunately,
I've not managed to get this running yet.
Have you tried "flag3" to enable audio monitoring? This should allow
you to hear the IRIG signal on the computer's speakers. Hearing the
signal would 100% verify that the signal is being inpu
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