[time-nuts] Fix Trimble Oscillator??

[Mark Sims]

Remove the inverter circuit!  It is not needed and might severely degrade the performance due to temperature issues, etc.  

You can specify the Tbolt DAC gain volts/Hz (both positive and negative values can bee used) and save it into EEPROM.  Lady Heather has an oscillator autotune function (&a) that will automatically determine the proper values.  The autotune function also sets the damping and time constant values to more time-nut desireable values and also sets the antenna elevation and signal level masks.

Note that you may need to first manually set the value in the general ballpark so that the unit can lock onto the GPS signal.   Once you have the unit setup,  let it run for a month or so and re-tune the parameters.  Before running the autotune,  I set the elevation mask to 0 degrees,  clear the signal level data,  a let it collect data for a few hours.   This lets it determine the best antenna elevation mask to use.