Comtech EF Data XTRT-400C Operation And Installation Manual page 134

Command Byte: 'A'
Function: Turns off high voltage. If the unit is in Filament Time Delay, this command ensures that high voltage will
not turn on when Filament Time Delay ends.
Command Byte: 'B'
Function: Resets any of the HPA's resetable faults.
Command Byte: 'D'
Function: The HPA seeks the specified power level for 10 seconds.
Parameter: The desired power level in "XX.X" dBW.
Compatibility: Attenuator required.
Command Byte: '@'
Function: Turns high voltage on. If the unit is in Filament Time Delay, high voltage will automatically turn on when
Filament Time Delay ends.
Command Byte: 'F'
Function: The HPA seeks the specified power level until Constant Power is terminated by Goto Power (Command
Byte 'D' or 'E') or Terminate Constant Power (Command Byte 'H'). Also called "Auto Gain Stabilization", the
Constant Power (dBW) command allows the user to operate an amplifier over extended periods of time while
maintaining a set power level. Constant Power Mode is intended to compensate for gain drift (due to time or
temperature).
Parameter: The desired power level in "XX.X" dBW.
Compatibility: Attenuator required.
MNC-0500-038
EAR EXPORT CONTROLLED: The information contained in this Manual refers or relates to a product that is subject
to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
whether in the U.S. or abroad, may require an export license from the U.S. Department of Commerce.
Amplifier Communication and Protocol, XTRT, Touchscreen TWTA
High Voltage Off
Fault Reset
Go To Power (dBW)
High Voltage On
Constant Power (dBW)
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