Broadcast Electronics FM-5T, User Manual

Page: 42 / 191

3-5
TABLE 3-1. FM-5T/FM-5TS PA/DRIVER CABINET CONTROLS AND INDICATORS
(Sheet 2 of 5)
INDEX
NO. NOMENCLATURE FUNCTION
3 SCREEN OVERLOAD Indicates a PA screen circuit overload has occurred
Indicator when illuminated.
4 GRID OVERLOAD Indicates a PA grid power supply overload has occurred
Indicator when illuminated.
5 FAILSAFE STATUS Indicates the failsafe interlock is closed when illumi-
Indicator nated.
6 INTERLOCK STATUS Indicates all transmitter internal interlocks are closed
Indicator when illuminated.
7 BLOWER STATUS Indicates proper operation of the blower when illuminated.
Indicator
8 FILAMENT STATUS Indicates primary ac power is applied to the PA filament
Indicator regulator when illuminated.
9 HIGH VOLTAGE Indicates the plate power supply is operational when
STATUS Indicator illuminated.
10 POWER CONTROL SWITCH: In the automatic mode, moves the APC
RAISE reference upward when depressed. In the
Switch/Indicator manual mode, operates the screen control
motor in a direction which will raise trans-
mitter RF output power when depressed.
INDICATOR: Illuminates to indicate the screen control
motor is operating in a direction which will
raise the transmitter RF power output.
11 POWER CONTROL SWITCH: In the automatic mode, moves the APC
LOWER reference downward when depressed. In
Switch/Indicator the manual mode, operates the screen con-
trol motor in a direction which will reduce
transmitter RF output power when de-
pressed.
INDICATOR: Illuminates to indicate the screen control
motor is operating in a direction which will
lower the transmitter RF power output.
12 POWER CONTROL SWITCH: Selects APC control operation of the transmitter.
APC ON INDICATOR: Indicates the transmitter is under APC
Switch/Indicator control when illuminated.
13 MODEM PORT 1 A modem port used for transmitter monitoring and remote
control operations.