Arthur Dent-"The -12 VDC is used for the RS-232 so if that was giving you the problem you wouldn't see anything on your com port (note it will work at -7 VDC or so)......."
the -12 VDC is also used by the OCXO as tuning voltage! Bert Kehren It may or may not be used for tuning voltage but what I said is 100% correct. The Andrew/Grayson units these T-Bolts were used in provided -7 VDC for this negative supply and the same T-Bolts work properly on -12 VDC. If this voltage is missing, the com port will not work. -Arthur _______________________________________________ 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.