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SUM FAULT
TRANSMIT
BEAM ON
Doc. 01031254 Rev. 1
The Sum Fault status indicates that the MPA Hub Mount is
latched into the Fault state. When the MPA Hub Mount is
latched into the Fault state, the user must clear the fault source
and issue a Reset command to return it to a normal operating
condition.
Note: During normal operation, the relay is energized. (There
is continuity between the "NO" and "COM" contacts.) The
relay will de-energize when a fault occurs.
Transmit indicates that the Beam is turned on and the RF is not
inhibited. This is the normal operating state of the amplifier.
Note that the amplifier will cease transmitting (and the
Transmit indication will be negated) when any of the interlock
circuits (External Latching I/L, External Non-Latching I/L, or
RF Inhibit) opens.
Note: When the amplifier is in the Transmit state, the relay is
energized. (There is continuity between the "NO" and "COM"
contacts.) The relay will de-energize when a fault occurs.
Beam On tracks the Beam state (HV applied to TWT).
Note: When the Beam is On, the relay is energized. (There is
continuity between the "NO" and "COM" contacts.) The relay
will de-energize when a fault occurs.
M P A H U B M O U N T
4-5
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