86 9 November 2001 Transmitters
LED Status Indicators Use the indicators, controls, and test points on the front
panel of the module to monitor transmitter performance.
Label LED
State
Indicates
AGC
Green
Red
Off
Transmitter is in AGC mode, and its RF drive
level has been automatically adjusted to
match the factory-set AGC reference.
Transmitter is in AGC mode, but RF input to
TX is outside of AGC operating window.
The transmitter’s RF drive level cannot be
automatically adjusted to match the
factory-set RF level.
The transmitter is in manual mode. Use
manual gain control to adjust the RF drive
level by ± 3 dB from input level.
PWR
Green
Blinking
Green
Off
Transmitter module is powered.
Transmitter is stabilizing during initialization
or is disabled by Automatic Shutdown.
No power to transmitter.
LASER
(See also
p116.)
Ye l l ow
Blinking
Ye l l ow
Flashing
Ye l l ow
Off
Laser is on.
Continuous blinking indicates laser
temperature is above 65°C.
Single, periodic flashes indicate that laser has
been disabled by Automatic Shutdown. The
associated receiver periodically initiates the
restart sequence.
If this occurs at start-up, the shield may be
out of place or the bottom screw securing
the shield is not tight.
If the unit has been running, laser
temperature may be greater than 75°C.
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