TM 11-5895-846-14
Table 3-7. Waveguide Switch w/Air Vent, Operator's Controls
Item
Fig.
No.
Control, indicator or connector
function
reference.
WAVEGUIDE SWITCH W/AIR VENT SM-D-936346 (WAVEGUIDE SWITCH W/AIR VENT)
1
AIR VENT
Provides for adequate air circulation during the warm up period.
2
PA1, ON LINE, PA2 Control
Provides for switching of the waveguide system outputs from
power amplifiers and inputs to antennas and the dummy load.
3
Proximity Switch
Opens when waveguide connection is not tight and inhibits
power amplifier.
Table 3-8. Power Amplifier, Operator's Controls and Indicators
Item
Fig.
No.
Control, indicator or connector
function
reference.
AMPLIFIER, RADIO FREQUENCY AM-6703/TSC (POWER AMPLIFIER)
1
SHF OUT Connector
Provides waveguide connection for output of power amplifier.
2
FIL HRS Indicator
Indicates total hours that power is applied to filaments of
klystron.
3
FAULT Indicator
Illuminates when the output power falls below the alarm setting.
4
MONITOR Meter
Provides indication of applicable values as selected by
MONITOR switch.
5
MONITOR Switch
Provides for switching of voltages and power levels to
MONITOR meter.
6
REFL WATTS/FWD
Selects either reflected (white markings) or forward power
WATTS DBM Switch
levels for measurements on MONITOR meter.
7
ZERO SET Control
Provides for zeroing MONITOR meter when ZERO SET
switch is placed in SET position.
8
ZERO SET Switch
Allows MONITOR meter zero adjustment when held in SET
(Spring-loaded)
position.
9
SHF TEST OUT
Supplies sample of PA transmit output to test translator in
Connector
LNA control/translator.
10
SHF IN Connector
RF input for transmit operating frequency signal from
upconverter.
11
OUTPUT LEVEL Control
Adjusts power output level of power amplifier.
12
LOW OUTPUT ALARM
Adjusts level at which low output will activate alarm system.
SET Control
Table 3-9. Power Supply PP-7087, Operator's Controls and Indicators
Item
Fig.
No.
Control, indicator or connector
function
reference.
POWER SUPPLY PP-7087/TSC (PWR SPLY PP-7087)
1
MONITOR Meter
Provides indication of applicable voltage and current levels as
selected by MONITOR switch.
2
MONITOR Switch
Provides for switching of signals to MONITOR meter for fault
isolation purposes.
3
FAULT Display Indicators
One or more indicators will illuminate to indicate type of fault
occurring in power supply or power amplifiers.
4
STATUS Display Indicators
One or more indicators will illuminate to indicate operating
status of power amplifier.
5
AC POWER Indicator
Illuminates when AC power is applied to the unit from the
power distribution panel.
6
OPERATOR-STANDBY Switch
Places transmit function in an operating or standby condition,
as desired.
7
FAULT CKT/TEST Switch
In TEST position, tests operation of all fault and status circuits.
The FAULT and STATUS displays will be illuminated.
8
FAULT CKT/RESET
In RESET position, resets BODY OVLD, HV ARC, and primary
crow-bar circuits.
9
BLOWER Circuit Breaker
In ON position applies AC power to power amplifier kystron
blower.
10
START Circuit Breaker
In ON position applies AC power to start module in the unit
and to power supply fan.
11
HV MAIN Fuse
Protects high voltage circuits from overload or short circuit.
12
LV Fuse
Protects low voltage circuits from overload or short circuit.
13
HV1 through HV4 Fuses
Protects each of the HV rectifier circuits.
Through
16
17
SPARE Fuse Holders
Provide storage space for fuses used in HV1 through HV4, LV,
and HV MAIN fuse sockets.
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