Feature request: Allow disabling regulation/manual PWM control #2
Description
First of all thanks a lot for the work on this repository, upgraded my GPSDO two days ago and it is so much better than the original firmware.
As of now, the firmware will always use GPS to synchronize/tune the OCXO (and keep the currently set value when there is no GPS reception). For debugging it may however be useful to disable the regulation and instead manually configure the PWM value (and only measure the deviation to the GPS PPS signal).
Possible use cases for manual PWM control:
- Measure the sensitivity from PWM change to OCXO frequency change
- Measure the OCXO tuning range (by setting the PWM to the minimum/maximum possible value and checking the resulting deviation)
- Check deviations during the OCXO warmup process (to figure out how long the OCXO needs to reach a certain level of stability).
- Monitor aging/drift by re-attaching GPS antenna after some waiting time and reading out the difference
This feature could be integrated into the exiting menu structure via the algorithm selection (by adding a new algorithm for manual control), if that is selected there should be no automatic PWM adjustments at all and the user should be able to configure the PWM value manually.