[ntp:questions] Fwd: Re: NetBSD GPS/PPS using 4.2.6p3

John Hasler jhasler at newsguy.com
Wed Aug 24 13:28:58 UTC 2011


David writes:
> The DCD line is positive active, so it needs to go high for 100-200
> ms, and then return low.  Yes, it's the opposite of the other RS-232
> signals....

All the RS232 control lines are active positive.  The data lines are
active negative.


-- 
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA




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