Mark, When I press "D" Lady Heather replies: Manual disciplining not supported by this receiver....press ESC Questions about the Z3801A: Does the oscillator have an adjustment? If so, is this somewhat accessible without destroying the assembly? Are there pictures of the oscillator assembly? Is there an adjustment for temperature? Is this accessible? Thanks, Joe, W7LUX Lady Heather has a command that lets you set the DAC voltage. It's in the "D" menu. Depending upon the firmware, you may need to disable disciplining first (also in the "D" menu). If the DAC command works to change the OCXO freq, the osc EFC and DAC are probably OK. If it does not, I'd suspect the DAC or the osc EFC input... or perhaps your firmware does no support the DAC setting command.

Hi > On Mar 4, 2018, at 10:30 PM, Joe Hobart <nova@npgcable.com> wrote: > > > Mark, > > When I press "D" Lady Heather replies: > > Manual disciplining not supported by this receiver....press ESC > > > Questions about the Z3801A: > > Does the oscillator have an adjustment? If so, is this somewhat accessible Yes, if you dig deep enough > without destroying the assembly? Depends on how good you are at ripping into things > Are there pictures of the oscillator assembly? I believe there are in the archives > > Is there an adjustment for temperature? Yes, by changing the select resistor > Is this accessible? Yes, once you have the inside oven board out of the enclosure. Accessible is a relative term. I would not dig that deep. Others on the list seem to be happy going that far into the assembly. Bob > > Thanks, > Joe, W7LUX > > > Lady Heather has a command that lets you set the DAC voltage. It's in the "D" > menu. Depending upon the firmware, you may need to disable disciplining first > (also in the "D" menu). If the DAC command works to change the OCXO freq, the > osc EFC and DAC are probably OK. If it does not, I'd suspect the DAC or the > osc EFC input... or perhaps your firmware does no support the DAC setting command. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.