MNC-0500-026 27 of 32 Revision G
Amplifier Communication and Protocol, Rabbit CPU
Reflected RF Trip
Command Byte: ‘O’
Function: Sets a Reflected RF trip point. If reflected power exceeds the set
point, an alarm or fault is generated, as specified by the user. (Note: A
harware Reflected RF Trip Point is pre-set at the factory. You cannot adjust
the hardware trip point by changing the software trip point). By default, the
trip point is not enabled until the “Enable RF Limits” command (‘R’) is
processed.
Parameter:
“AXXXX” to set an Alarm trip point.,
“FXXXX” to set a Fault trip point, “D” to disable.
XXXX is the desired trip pont in Watts.
Optional Parameter: “M” - desired power in dBm.
Example: OAMxx.x
RF Inhibit
Command Byte: ‘I’
Function: Inhibits RF drive to the TWT.
Compatibility: Attenuator required.
Reset Processor
Command Byte: ‘ ’
Function: Resets the processor.
Note: Unit does not reply to this command.
Set Attenuator
Command Byte: ‘K’
Parameter: “XX.X” dB of attenuation OR
“IX.X” to increase attenuation by X.X OR
“DX.X” to decrease attenuation by X.X
Function: Instantly sets the attenuator to the specified dB level. Use caution,
as sudden large changes to output power can damage the TWT.
Response: Resulting attenuation in XX.X dB. If the user specified an
attenuation value outside the attenuator’s range, the closest valid value will
be used.
Note: Use this to find max attenuation. For example, send {AK 99.9}. A
typical response would be {AK 30.0}, indicating a 30 dB attenuation range.
Compatibility: Attenuator required.
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