[ntp:questions] Re: Meaning of PPS flag2 -- assert/clear

Hal Murray hmurray at suespammers.org
Sat Oct 7 19:21:47 UTC 2006

>On my Z3801A, with this part of the mod done per Jeff's page and
>measuring the signal on the RS-232 wire using a breakout box, the DCD
>line is normally high and goes low for 20us; that's what I would
>consider "normal" RS-232 behavior, though most PPS sources are just the
>opposite since they're using a positive going pulse.

I screwed up.  Sigh/sorry.  I had the scope probes on the other
side of an inverter from my brain.  So turn everything I said
upside down.

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