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5.6.3
Standby State
The STANDBY state is the normal beam-off state. During
STANDBY, high voltage is off and the unit does not amplify the RF
input drive signal.
While the unit is in the STANDBY state, the STBY LED is lit. After
the beam is off for one minute, the Heater Reduce command is
activated.
CAUTION! Leaving the amplifier in Standby for more than 4 hours is not
recommended. TWT longevity can be reduced.
5.6.4
Beam On Sequence
Beam on sequence (BONS) covers the transition from Standby
(beam off) to Transmit (beam on). During BONS the green
Transmit light will flash.
5.6.5
Transmit State
Transmit is the normal beam-on state (high voltage on, heater
reduce off). RF Inhibit may be on or off.
If a fault occurs, the unit will transition via the BOFS (Beam Off
Sequence) to the Fault state. A successful fault recycle attempt will
return amplifier operation to Transmit.
5.6.6
Beam Off Sequence
The BOFS (Beam off sequence) describes the transition from
Transmit or BONS to any beam-off state.
Doc. 01031254 Rev. 1
M P A H U B M O U N T
5-7
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