TM11-5895-846-14
The associated POWER indicator should be illuminated.
assigned on-line status.
Set the power output to
j.
On the associated upconverter place the
assigned level on the associated power amplifier.
Proceed as follows:
FREQ SELECT MHz switches to the assigned transmit
a. On the power distribution panel place the
frequency.
k. Place the MONITOR switch to the SYNTH
MODE SELECT PA/AIR COND switch to the PA/AIR
COND 2 PA2/AIR COND 2 position (air conditioner No.
position.
I.
2 will be turned on). Observe on both power supplies
Place the SYNTH MON switch to the 0 ERR
that the AC POWER indicator is illuminated.
position. Observe that the OUT OF LOCK indicator is
b. Position the transmit waveguide switch so that
illuminated.
m. Push to unlock then rotate the FREQ TUNE
the transmitter group is terminated into the dummy load.
c. On the associated transmit-receive modem,
control until the MHz dial is at the assigned frequency.
As the correct frequency is reached, the OUT OF LOCK
d. On the power supply check that the FIL
indicator will be extinguished.
n. Fine tune the FREQ TUNE control by adjusting
INHIBIT indicator has turned off. Place the OPERATE
STANDBY switch to the OPERATE position. Check that
it for a mid-scale reading on the MONITOR meter.
o. Release the FREQ TUNE control to lock it.
all FAULT indicators are off, the STANDBY indicator is
off, and the OPERATE indicator is illuminated.
e. On the associated power amplifier place the
3-12.
Tuning the Receiver
MONITOR range switch to the appropriate (assigned)
Assume that a different receiver is assigned to on-line
power range position, X1, X10, or X100 (use upper watts
status and operating on a different frequency than that
range scale, black stencil).
f.
Unlock the ZERO SET/ZERO control.
follows:
g. While holding the ZERO SET/SET-NORMAL
a. Check that the POWER circuit breaker is in the
toggle switch in the SET position, adjust the ZERO
ON position and that the associated POWER indicator is
control for a zero reading on the MONITOR meter.
illuminated.
h. Lock the ZERO control and then release the
b. On the downconverter place the FREQ
SET-NORMAL toggle switch.
SELECT MHz switches to the assigned receive
i.
Adjust the OUTPUT LEVEL control for
frequency.
approximately 1/2 of the desired power output level as
c. Place the MONITOR switch to the SYNTH
indicated on the MONITOR meter.
position.
j.
Unlock the LOW OUTPUT ALARM SET
d. Place the SYNTH MON switch to the 0 ERR
control and adjust until the front panel FAULT indicator is
position. Observe that the OUT OF LOCK indicator is
just illuminated. Lock the control.
illuminated.
k. Adjust the OUTPUT LEVEL control for the
e. Push to unlock, then rotate the FREQ TUNE
desired power output level as indicated on the MONITOR
control until the MHz dial is at the assigned frequency.
meter. The FAULT indicator should be extinguished.
As the correct frequency is reached the OUT OF LOCK
NOTE
indicator will be extinguished.
f.
Fine tune the FREQ TUNE control by adjusting
The power amplifier low output level
it for a mid-scale reading on the MONITOR meter.
alarm is now set.
g. Release the FREQ TUNE control to lock it.
l.
On the power supply place the OPERATE-
3-13.
STANDBY switch to the STANDBY position.
Assume that a different transmitter group (1 of 2) is
3-32