I seem to remember there was a message about this a couple of months
ago, but I can't find it now.

Can someone tell me definitively the electrical meaning of pps driver
flag2?  More precisely, how should flag2 be set for:

1.  Signal on DCD line normally high, going low at the on-time mark

2.  Signal on DCD line normally low, going high at the on-time mark

In each case, it's the initial transition that's on-time; the trailing
edge of the pulse is not precise.

Thanks,

John
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