Attenuator Control; Mute Control; Faults - Comtech EF Data HPOD Installation And Operation Manual

HPOD C-, X-, Ku-Band High-Power Outdoor Amplifier
Serial-Based Remote Product Management
Permanent damage may occur to the unit if the maximum input level exceeds 15 dBm.

5.2.2 Attenuator Control

Execute the "ATT" command to attenuate HPOD gain over a 30 dB range.

5.2.3 Mute Control

The amplifier may be muted via software or discrete control:
•
Execute the MUT=1 command to "software" mute the unit. The Mute command provides over 75 dB of RF on/off isolation.
However, the Mute command only turns off the first few low power stages of the amplifier – the high power stages remain on.
By allowing the higher power transistors to stay on, the amplifier remains in a more thermally stable state should the mute
condition be removed. If you desire to turn off the bias to the entire amplifier completely (perhaps to conserve energy in a
redundancy system), you must execute both the MUT=1 and AMP=0 commands.
For normal transmit operation, MUT=0 and AMP=1 are required.
•
The amplifier also may be "hardware" muted by pulling Pin 'S' on the J6 | COM1 discrete control port to ground (see Chapter 2.
EXTERNAL CONNECTORS AND PINOUTS).

5.2.4 Faults

The M&C system monitors certain key functions of the SSPA for proper operation. Should any of these operating parameters exceed
predetermined limits, the M&C system will declare a fault. Conditions that trigger a fault include:
•
Any power supply more than ± 10% outside its nominal value.
•
Either fan less than 25% of maximum speed.
•
I2C internal bus communications fault.
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MN/HPOD.IOM