User's Manual

8M074X02-01 Rev.0
14
8.0 OPERATION
8.1 GENERAL
The Channel Module does not require any supervision once it is installed and set up. The status of the
unit is indicated by Front Panel Indicators:
• TX DIS Indicator is a dual function indicator.
• TX DIS Indicator is on when transmit is disabled as described later.
• TX DIS Indicator is flashing when one of the synthesizers is out of lock (likely due to the
Channel Module not being properly programmed).
• DC ON Indicator is a dual function indicator too.
• DC ON Indicator is on when the Channel Module is supplied by DC power
supply.
• DC ON Indicator flashes shortly when a valid polling serial message is received
from a controller.
• TX ON Indicator is on when the Channel Module is transmitting.
• RX ON Indicator is on when the RF input signal is above the programmed “Rx Level
threshold comparator” level.
• PWR Indicator is a dual function indicator.
• PWR Indicator is permanently on when the output RF power is outside of the allowed
output power tolerance.
• PWR Indicator is flashing alternatively with VSWR Indicator when an error is found in the
personality of the Channel Module.
• VSWR Indicator is on when an excessive reflected power is detected on the Tx
Antenna connector at the instant when the transmitter is turned on.
8.2 TRANSMIT DISABLE
The Channel Module transmitter can be disabled by TX DIS switch. TX DIS switch is accessed via the
front panel hole with a round tool 2.5mm (0.1”) in diameter. The first push disables the transmitter, the
second push enables the transmitter. This function is useful during Channel Module set up and servicing.