After replacing the GPS module in Z3801A #2, I fired it up and let it run. For over an hour, things looked OK, then the PPS TI/s rose dramatically. Later, it started back down, Other than a high HUP, everything else looked good. What would cause this to happen? https://dl.dropboxusercontent.com/u/19599147/Crazy%20PPS.png Joe Gray W5JG