James Wilson said: > I can't see what the other ICs on Bert's board are, but I gather it is using > the timing module's sawtooth error data to set the programmable delay line. > This seems to be a good option if the receiver of the PPS signal cannot > accept adjustment data, but what can it do if the qErr data indicates the > next pulse is going to be late instead of early? Tell the GPS unit that the antenna cable is longer than it really is. That will shift the pulse earlier so you can add a constant to the delay you are feediing to the delay chip. -- These are my opinions. I hate spam.