Z3801A (DTE) DB25S connector

Pin Number Input/Output Description
1   Cable shield
2(A), 14(B) Output RS-422/530 TxD - GPS receiver output
3(A), 16(B) Input RS-422/530 RxD - GPS receiver input
7   Signal ground
15, 12 10 MHz -, + 10 MHz differential pseudo ECL
11, 24 10 MHz -, + 10 MHz differential pseudo ECL
17, 9 1 PPS -, + 1 PPS differential pseudo ECL
8, 21 1 PPS -, + 1 PPS differential pseudo ECL
all other pins   No connection