MAN-70009, REV A
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The SOLID STATE Amplifier is designed with a variety of protection circuits to provide safeguards for
the amplifier should any adverse electrical conditions occur or if the amplifier is accidentally
experiencing operator deviation of the design application. Listed below are the safeguards.
4.5.1 Over Heat Protection
The SOLID STATE critical components of this Amplifier is mounted to a heat sink which in turn, air
cooled by high efficiency blower. Should an over heating condition occur, either through component
failure or by a restricted air flow, the Amplifier contains heat sensors that will shut down the system
should an over heating condition occur. As a result, the air inlet and outlet openings should be free of
obstructions for proper cooling of the amplifier. Operation is restored by the Fault/Reset button when
the amplifier cools to normal temperature levels.
4.5.2 PA Module Over temperature Fault
The PA modules have internal temperature monitoring which is displayed on the Color display [the
display will only show the temperature of # of modules used]. If the temperature in any modules rises
above the set limit the amplifier will revert to Standby and the Fault Indication on the front panel
Display of the Amplifier will display the related fault.
4.5.3 Mismatch Protection
The Amplifier is designed to operate with a tuned 50 Ohm load and should any mismatching of the 50
Ohm occur the Reverse Power, also called Reflective Power, will increase producing a high VSWR.
The Amplifier microprocessor monitors the Reverse Power levels by utilizing a Dual Directional
Coupler. When the Reflected Power exceeds 25% the Amplifier Output Power it will go to STBY and
the High VSWR message will be indicate on the TFT display. The Reverse Power is also displayed on
the TFT Display for operator monitoring for any mismatched load.
4.6 STATUS INDICATORS, CONTROLS AND CONNECTORS
The Amplifier has various controls and status indicators which are identified below and can be visually
located on Figure 6.0, Illustration and Figure 11.0, Rear Panel Illustration. A narrative description for
the function and purpose of each control and status indicator is provided within paragraphs 4.7 and
RF AMPLIFIER
Front Panel
Rear Panel
Power ON/OFF Ckt Bkr
AC PWR Entry Power Connector
