ashtech HDS800, Reference Manual

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Receiver Description
RS232 Configuration (all ports):
RS422 Configuration (port A only):
Port A can be switched to RS232 or RS422 using the
$PASHS,MDP command. RS232 inputs/outputs are typically
± 10 Volt asymmetrical signals with respect to ground.
RS422 inputs/outputs are 0/+5 Volt symmetrical signals
(differential lines).
Important! Pin 1 on port A delivering 12 V DC with an average
DC current of 0.5 A and a peak DC current of 1 A, is a
hardware option. Do not forget to mention this option in your
Purchase Order if you want port A to be fitted with this
feature. With the hardware option duly installed, remember
Pin Signal Name Description
1 +12 V DC or NC
12-V DC Output (port A only, and as an option).
For all other ports: NC
2 GND Ground
3 CTS Clear To Send
4 RTS Ready To Send
5 RXD Receive Data
6 TXD Transmit Data
7 PPS or EVENT
1PPS output (port A only)
Event Marker input (port B only)
Pin Signal Name Description
1 +12 V DC 12-V DC Output
2 GND Ground
3 RXD- Receive Data-
4 TXD+ Transmit Data+
5 RXD+ Receive Data+
6 TXD- Transmit Data-
7 PPS 1PPS output
1
2
3
4
7
6
5
5
4
6
7
2
1
3