User's Manual

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©2013 Broadcast Electronics
7.4 Mute
A mute refers to a lack of an RF source in some part of the system, and the affected part
depends on the context of the notification. Mute indications can happen at various stages
for different reasons, and details in system sections below should be considered.
Transmitter mute conditions typically refer to the FM exciter. In internal exciters this
commonly occurs when:
• There is no power to the exciter
• The transmitter is turned off
• The mute input pin on the remote station interface is asserted
• Failsafe input is not asserted
• The BE Interface active input is not asserted
7.5 Internal Exciter Diagnostics
Table 2 – Exciter Diagnostics Details
Fault/Alarm
Description
AFC Unlock Alarm
Automatic frequency control system does not yet have lock.
Modulation Silence
Alarm
This alarm activates when a silence condition is detected in
exciter modulation.
Audio Input Silence
Alarm
This alarm activates when a silence condition is detected at the
exciter input.
Communication Fault
This fault occurs when communication between the system
controller and the internal exciter is nonfunctional.
7.6 Power Amplifier Diagnostics
Table 3 – PA Diagnostics Details
Fault/Alarm
Description
RF Power Supply Fault
This fault activates when a power source failure is detected.
Reflected Power Fault
This fault activates when a sudden increase in reflected power
is detected by hardware in the power amplifier.
VSWR Fault
This fault activates when the measured VSWR is greater than
the maximum VSWR rating of the system any power level
Temperature Fault
This fault actives when the measured internal heat sink
temperature exceeds the safe limit
Current Fault
There is current monitoring on the final stage RF amplifiers. The
PA shuts down when measured current on any of these solid
state amplifiers exceeds the safe limit.
Hardware Fault
This is an internal self-report of problems in PA control
hardware.
Communication Fault
This fault occurs when communication between the system
controller and the PA is lost.
Power Supply DC Alarm
This is a direct connection to a self-reported DC level issue in
any power supply. This asserts when the voltage is too far from
nominal. This is normal behavior when the PA is turned off for
any reason.
Reflected Power
During FM only operation, the PA attempts to lower its output