CPI T02KO, Руководство по установке и эксплуатации

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KA BAND OUTDOOR TWT AMPLIFIER
5-4
5.4.2 Prime Power Interrupts
The amplifier will automatically recover after a prime power failure. Transient prime power
interrupts result in proportional time delays before the amplifier returns to the pre-interrupt
operational state. (See 5.6.2.) The purpose of the proportional delay cycle is to re-establish the
proper cathode operating temperature before the high voltage is turned ON.
5.5 Making Routine Safety Checks
It is very important that the user confirm the Ka-Band TWTA trip settings. These have been set at
the factory for checkout. Verification of the trip settings should be made more often if several
operators have used the equipment. Failure to operate the Ka-Band TWTA with the correct
settings can result in damage that is not covered by the warranty. For this reason, the procedure
that changes the trip settings should be given only to the authorized personnel.
5.6 Description of Amplifier States
The operation of the Ka-Band TWTA may be divided into several states and sequences. They are
as follows:
POST (Power On Self Test)-Initial power on.
HTD (Heater Time Delay)-Beam off state while cathode heats to operating temperature.
STANDBY- Normal beam off state. (High Voltage not applied to the TWT.)
BONS (Beam On Sequence)-Transition from the STANDBY state (beam off) to the TRANSMIT
state (beam on).
TRANSMIT-Beam on state (in this state, the ODU Ka-Band TWTA amplifies the RF input signal to
the rated output level).
BOFS (Beam Off Sequence)-Transition from TRANSMIT state to any beam-off state.
Fault (Non-latched)-Beam-off malfunction state; the amplifier will automatically recycle to the
state that existed prior to the fault.
Fault (Latched)-Beam-off malfunction state. User intervention required to return the amplifier to a
normal operating state.
Each operating state is described in greater detail in the following text.
INSTALLATION AND OPERATION MANUAL