Broadcast Electronics FM-5T, User Manual, Page: 44 / 191

3-7
TABLE 3-1. FM-5T/FM-5TS PA/DRIVER CABINET CONTROLS AND INDICATORS
(Sheet 4 of 5)
INDEX
NO. NOMENCLATURE FUNCTION
23 OVERLOAD RESET SWITCH: Clears the overload circuit memory when
Switch/Indicator depressed.
INDICATOR: Indicates an overload condition exists when
illuminated.
24 P RIMARY VOLTAGE Displays PHASE 1-2, PHASE 2-3, or PHASE 3-1
Meter primary ac input voltage potentials as selected by
the PRIMARY VOLTAGE switch.
25 PRIMARY VOLTAGE Selects PHASE 1-2, PHASE 2-3, and PHASE 3-1
Switch primary ac input voltage parameters to be displayed
on the PRIMARY VOLTAGE meter.
26 AC POWER Provides overload protection and primary power
Circuit Breaker control for the transmitter AC input.
27 BLOWER Provides overload protection and primary power
Circuit Breaker control for the blower, flushing fans, the automatic
power control unit, and the transmitter controller.
28 FILAMENT Provides overload protection and primary power
Circuit Breaker control for the PA tube filament supply, the control
grid bias supply, and the hum null circuitry.
29 DRIVER Provides overload protection and primary power
Circuit Breakers control for the FM exciter and intermediate power
amplifier.
30 SCREEN Provides overload protection and primary power
Circuit Breaker control for the PA screen grid power supply.
31 FILAMENT TIME Indicates hours of filament circuit operation.
Meter
32 FILAMENT ADJUST Adjusts the PA tube filament voltage.
Control
33 INPUT TUNING Tunes the PA stage input circuit to resonance.
Control and
Cyclometer
34 FILAMENT Indicates the PA tube filament voltage.
VOLTAGE Meter
35 MULTIMETER Selects PA SCREEN VOLTAGE, SCREEN CURRENT,
Switch GRID CURRENT, GRID VOLTAGE, EXC FWD
POWER, or EXC RFL POWER parameters to be displayed
on the MULTIMETER .