An idea is struggling to take shape in my fevered brain. I'd like to check some foundation assumptions.
1. The difficulty with disciplining a local oscillator to a GPS signal is due to variations in the received GPS signal and the LO. 2. The variations occur slowly, as crystal aging, and quickly - perhaps sawtooth or crystal crack propagation - and maybe something in between. 3. The gain of the system, in degrees of phase angle at 10 MHz (or higher) per microvolt of control signal, is fairly constant in a controlled environment. 4. The power supply for the device providing the control signal cannot be regulated to the accuracy required of the system, and so is a source of variance. (Does anyone put the voltage reference device in the oven with the crystal?) 5. The principle source of environmental variation is temperature. Humidity and barometric pressure are not significant. This may not be true of the received GPS signal due to atmospheric variations. 6. A digital computational device is available to calculate the control signal from various measurements and previous values. 7. There are no supernatural forces at work, such as the experimenter mentally influencing the results. :-) That's a start . . . Thanks for any replies. Bill Hawkins _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
