![]() ![]() I even upgraded the firmware to the latest as of this writing (v1.08), but it still made no difference. I tried changing the PPS bias to GPS time and back to UTC time, but that didn't change anything either. ![]() I tried different configurations of single and multiple GNSS constellations but it didn't make any difference. I believe it's an undocumented bug in the firmware. That's why that I believe this problem may be caused by reception conditions. Sometimes it can run stable for a few seconds, then go back to jittering. There was breaks in recorded data as the jitter started and stopped. Then, the stream stopped because became unavailable because the PPS started jittering again. As I started writing this, the PPS was stable and I was listening to the stream. Eventually, it will run stable, but because of the intermittent nature of this anomaly, the only thing I could think of that is causing this would be reception, as reception conditions constantly change as satellites pass overhead. When you connect the antenna and it acquires a 3D fix again and the "PPS Good" indicator reports "good", the jitter resumes. As soon as it reports as bad, the jitter stops immediately and it runs off its holdover. Hi Paul, Yes, when this falling and rising edge PPS jitter is occurring, disconnecting the antenna will cause the "PPS Good" indicator in the TSIP serial data to report as "bad" after about 8 seconds or so. ![]()
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