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4.6.1 CMX25 PANEL STATUS INDICATORS - continued
INDICATOR
FUNCTION
Fault LED
The Fault LED illuninates when either a Thermal, Power Supply or
Module Fault occurs.
A Thermal Fault occurs when the amplifier is operating outside
design temperatures. Should an excessive temperature condition
occur, the + 28 VDC Supply is shut down and the +28 Green LED
will extinguish. Once the thermal condition returns to the
operational limits, the Fault LED will extinguish, the +28 VDC
will activate and the +28 Green LED will illuminate.
A Power Supply Fault is illuminated when the +28 VDC Power
Supply voltage shuts down. The + 28 Green LED will extinguish
when this failure condition occurs.
A Module Fault occurs when an anomaly was detected by the
microprocessor. When this condition occurs, an error code is
stored and displayed on the LCD display of the CMX25.
Hi VSWR LED
When the Hi VSWR Red LED is illuminated, the amplifier is
subjected to a condition where the Reflected Power exceeds 25%.
The microprocessor turns down the gain of the preamplifier and
displays the Reverse Power on the LCD Display.
Band 1 / Band 2 LED
The Band 1 and Band 2 Red LEDs are status indicators identifying
which band mode is in operation.
Auto Limit LED
The Auto Limit Red LED indicates, when illuminated, that the
output driver is exceeding the maximum input levels for the Final
Low Band Distributed Amplifier. The microprocessor turns down
the gain to design operating levels and illuminates the Auto Limit
LED. When the input gain is turned down to a appropriate level,
the Auto Limit LED will extinguish.
GPIB Remote
The GPIB Green LED indicates, when illuminated, that the
amplifier is in the remote control mode of operation via the IEEE-
488 GBIP Bus.
