Operations and Maintenance Manual

70-STR1800-00 Rev K STR-1800 O&M Manual
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Pin
Signal
DESCRIPTION AND CHARACTERISTICS
1
RD (Input)
Data input to radio. RS-232 electrical levels.
2
Conn Key
A stubbed (i.e.; filled) pin location which prevents users from
connecting a standard UART DB-9 cable into the radio.
3
TD (Output)
Data output from radio. RS-232 electrical levels.
4
RFPDO
Remote front panel data output. TTL electrical levels.
5
GND
Ground
6
USBD+
Universal serial data bus positive. USB electrical levels.
7
USBD-
Universal serial data bus negative. USB electrical levels.
8
RFPDI
Remote front panel data input. TTL electrical levels.
9
RFP+8 V
Remote front panel +8 Volt output. DC output power.
As identified in the section that follows this, these interfaces should only be used with cable assemblies
provided by SRI.