Product Manual

24
Introduction
configuration software is used. Setting the central frequency
requires additional instrumentation.
The central frequency of the U-Link TRx can be read on the
label placed on the transmitter case.
The central frequency of both the U-Link TRx and U-Link Rx
can be read using the $PASHQ,RDP,PAR command (the
central frequency setting is the last parameter in the
response line).
U-Link TRx LEDs
Two LEDs located at the bottom of the case are used to
indicate the current status of the radio:
• ON indicator: a bi-color LED indicating power status and
serial port type. It is off when no power is applied to the
U-Link TRx. It is on when power is applied through the
cable. The LED color then depends on the current setting
of the serial port: green if it is of the RS232 type, or red
if it is of the RS422 type.
• TX-RX indicator: a bi-color LED indicating the current
transmission/reception status of the U-Link TRx. It is on
and red while data are being transmitted; it is on and
green while the U-Link TRx is properly receiving and
decoding data. In repeater mode, the LED should change
color at regular intervals of time (typically 1 second).
U-Link TRx Cable
Pinout and
Hardware Settings
The diagram below shows the pinout of the Y-shaped cable,
an integral part of the U-Link TRx, when the unit is
configured in RS422. The diagram also shows the location of
the hardware settings as well as the RS232 pinout in the unit.