Broadcast Electronics AM-2.5E, User Manual

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3-16
3-47.
CONTROLLER PWM MUTE INDICATOR.
3-48. The PWM mute indicator illuminates to indicate when the power control PWM signal is
muted. The power control PWM signal is muted during: 1) lightning conditions, 2) an ex
citer fault, 3) reflected power emergency conditions, 4) an open remote control fail-safe, or
5) a transmitter mute control signal.
3-49.
CONTROLLER REMOTE FAIL-SAFE INDICATOR.
3-50. The controller remote fail-safe indicator illuminates to indicate the remote control unit is
enabled. The indicator will extinguish when the remote control unit is disabled.
3-51.
EXCITER LOCK INDICATOR.
3-52. The exciter circuit board lock indicator illuminates to indicate when the exciter is locked to
the programmed carrier frequency. The indicator will extinguish when the exciter is un
locked from the programmed carrier frequency.
3-53.
E5V/+15V/-15V INDICATORS.
3-54. The exciter circuit board +5V, +15V, and -15V indicators display the status of the operating
potentials from the ECU power supply. The +5V, +15V, and -15V indicators will illuminate
to indicate the +5 volt, +15 volt, and -15 supplies are operational.
3-55.
STEREO EQUALIZATION INDICATORS.
3-56. The stereo circuit board equalization 1 indicator illuminates to indicate when equalization
circuit 1 is selected. The stereo circuit board equalization 2 indicator illuminates to indi
cate when equalization circuit 2 is selected.
3-57.
RF POWER MODULE INDICATORS.
3-58. The RF power module indicators are designed to present the operating status of the power
amplifier circuit boards and the modulator circuit board. Use the information presented in
Table 3-3 to determine the status of the power amplifier circuit boards and the modulator
circuit board.
3-59.
POWER SUPPLY INDICATORS.
3-60. On AM-5E models, the power supply indicators on the transmitter lower front-panel are
designed to present the operating status of the power supply circuit boards. The AM-5E
transmitter is equipped with power supply 1-2 and 3-4. The indicators illuminate to indi
cate a failure in a power supply.
3-61.
EXCITER NEGATIVE LIMITER INDICATOR.
3-62. The exciter circuit board negative limiter indicator displays the status of the exciter nega
tive limiter circuit. The indicator will illuminate to indicate the negative limiter circuit is
enabled. The indicator is factory adjusted to illuminate at approximately 94% negative
modulation.
3-63.
HIGH/LOW AC LINE CONDITIONS.
3-64. The transmitter is equipped with an ac line monitor. The monitor will deenergize the
transmitter in the event the ac power line is below 190 Volts or above 260 Volts. If this
condition occurs: 1) the transmitter output power will be disabled and 2) a no fault or
emergency condition will be generated. The transmitter will re-energize when the high/
low ac line condition is removed.