HPOD C-, X-, Ku-Band High-Power Outdoor Amplifier Revision 6
Serial-Based Remote Product Management MN/HPOD.IOM
5–2
Permanentdamagemayoccurtotheunitifthemaximuminputlevelexceeds15dBm.
5.2.2 Attenuator Control
Executethe“ATT”commandtoattenuateHPODgainovera30dBrange.
5.2.3 Mute Control
Theamplifiermaybemutedviasoftwareordiscretecontrol:
• Execute the MUT=1 command to “software” mute the unit. The Mute command provides over 75 dB of RF on/off isolation.
However,theMutecommandonlyturnsoffthefirstfewlowpowerstagesoftheamplifier–thehighpowerstagesremainon.
By allowing the high
er 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
redundancysystem),youmustexe
cuteboththeMUT=1andAMP=0commands.
Fornormaltransmitoperation,MUT=0andAMP=1arerequired.
• Theamplifieralsomaybe“hardware”mutedbypulling Pin‘S’ontheJ6|COM1discretecontrolporttoground(seeChapter2.
EXTERNALCONNECTORSANDPINOUTS).
5.2.4 Faults
TheM&CsystemmonitorscertainkeyfunctionsoftheSSPAforproperoperation.Shouldanyoftheseoperatingparametersexceed
predeterminedlimits,theM&Csystemwilldeclareafault. Conditionsthattriggerafaultinclude:
• Anypowersupplymorethan±10%outsideitsnominalvalue.
• Eitherfanle
ssthan25%ofmaximumspeed.
• I2Cinternalbuscommunicationsfault.
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