According to the RS232 interface schematic, Pin 6 on the Interface connector of the GPS goes to pin 1 of the MAXIM 233 IC. Mine has a Flex PCB connector which connects to terminals on the side of the can. Pin 6 ( 1 PPS signal) of the interface connector is not connected on this flex PCB, but pin 7 ( RXD2) is. Is pin 6 the correct pin to use, or did they really mean pin 7? Anyone know the reason for using this signal that eventually ends up at the DB9 pin 6 of the PC COM port? If anyone can verify that the schematic is correct, please let me know. hutch -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads