Check TWO things. 1.) Has the RS-232 level converter (1488/1489, MAX232, etc.) failed?
2.) What MODE is your Z3816A, SCPI? The GPSCon software places Z3816A into SCPI. This is discussed in K8CU’s notes, below: K8CU Notes - HP Z3816A GPS Frequency Standard Receiver https://www.realhamradio.com/GPS_Z3816A_Receiver.htm greg, w9gb === I am getting some very peculiar behavior with the serial interface on my GPS rcvr (Z3816A). To date, the only thing that works is Sat Stat on a windows 2000 computer. I am using a Null modem and set the monitor computer to 9600-8N1. Other computers and/or utilities seem to give irregular behavior. I have looked at the signals with a scope and they seem borderline OK. The signals (Rx and Tx) swing a bit more than +/- 7 V. There is also some digital noise riding on the lines. I also notice that the -15 Vdc line on the internal power supply is not working (it reads about + 1.2 V). Someone on the web I found a posting claiming that the -15 Vdc line is not needed for the Z3816A. Any help would be appreciated. 1. Is 9600-8N1 correct? 2. Could the lack of the -15 Vdc line be the root cause? 3. Has anyone managed to use GpsCon with a Z3816A? — Thanks much for any input! _______________________________________________ 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.
