MNC-0400-001
52 of 54
REV H
Operation, Rack and Digital HPAs
9. Turn on the RF drive signal.Slowly increase the RF drive to the
TWT by rotating the Gain Control clockwise. Monitor the RF output
power.
Caution
Do not exceed the dBm input power specification.
Driving the TWT by more than 2 dBm beyond the input
power required to reach the saturation point will over
drive the tube. Failure to comply may cause permanent
TWT damage.
Vorsicht
Überschreiten Sie nicht die vorgegebene dBm
Eingangsspannung. Wird das TWT mit mehr als 2 dBm
unter der für die Erreichung des Sättigungspunktes
erforderlichen Eingangsspannung angesteuert, so wird
die Röhre übersteuert. Nichtbefolgen kann das TWT
dauerhaft beschädigen.
10.Press the [
Enable
] and [
HV OFF
] keys at the same time. This turns
high voltage OFF. The Standby and Htr Standby Indicators are on
(amber).
The TWTA is ready for operational service.
Normal Turn-On
The following procedure assumes that the Initial Turn-on
procedure was successfully completed, the AC Power Switch
has been set to OFF (
O
), and the TWTA is properly connected
to the operational system.
1 Set the
AC Power switch
(Rear Panel) to ON (
|
). The AC Power
indicator should light (green) and the FTD indicator should light
(amber).
2. Wait until the Filament Time Delay cycle is complete (approximately
three minutes). When the Filament Time Delay cycle is complete,
the Standby indicator should light (green) and the FTD indicator
should go dark.
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