Re: Setting time on QCX - wspr mode
Thanks Alan for your reply. As I see it the 27mhz update from the GPS stream ensures an accurate transmission frequency. The 20mhz osc is updated by the GPS serial data stream (to quote
The 20MHz crystal is not calibrated during the regular GPS calibration at the end of each WSPR transmission. Only the real time clock (RTC) is set. It is not necessary to calibrate the 20MHz crystal every time since any minor frequency deviation due to temperature drift will cause an irrelevant time shift during WSPR operation.
20MHz crystal calibration using the GPS is possible in the alignment menu. It is enough to do this once when setting up the radio after assembly. It is not even necessary to do this, since even a few kHz of error will still have no important impact on timekeeping in the short-term (between RTC updates by the GPS at the end of each cycle).
73 Hans G0UPL