Paul, I finally got the WWVB d-psk-r board built. I have it connected to an Arduino UNO and to my NEO-6 GPS module.The GPS module has been re-programmed to 19.2k baud and only the GPRMC NEMA message is being sent. The MC34141 is running at 12 volts and I am using 620 ohm resistors to drive the transformer center taps.
I am feeding a 60 kHz sine wave into pin 8 of the transformer through a 0.47 uF non-polarized cap. I have my scope connected to pin 1 of the transformer through a 0.47 uF non-polarized cap. The 1 PPS LED connected to pin 2 of the 74HCT14 is following the 1 PPS led on the GPS board. I see the phase LED on the d-psk-r board blink at random. The LED on the UNO blinks in unison with the phase led. What should I see on the scope? I don't see anything that looks normal. No sine wave, just random pulses. I slowed the 60 kHz sine wave down to 30 Hz but still no sine wave. If I have the scan rate on the scope set to 100 msec, I would expect to see 1 second worth of sine waves. What should the output level of the 60 kHz signal from my AWG be set to? I have tried a few settings from 25 mV to 1 volt. Ray, AB7HE _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
