In a message dated 08/03/2008 03:57:02 GMT Standard Time, [EMAIL PROTECTED] writes:
The inverter is required because the Motorola GPS receiver uses TTL and the PC serial port uses RS232. RS232 uses a positive voltage of +3 to +25 volts to indicate a logic zero, and a negative voltage of -3 to -25 volts to indicate a logic one. ----------- My Motorola Oncore test rig uses a Max232 to interface the RS232, no inverter, and works fine. regards Nigel GM8PZR _______________________________________________ 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.
