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3.3 FRONT PANEL FEATURES (REFER TO FIGURE 3-2 BELOW)
OPERATE
STANDBY
EXIT
MAIN
ADJUST
4
5
1
10
POWER
2
3
11
12
9
8
7
6
INHIBIT
LOCAL
REMOTE
Figure 3-2 TWTA Front Panel
Table 3-1. Front Panel Features
Label Title
Function
1
MAIN POWER
Switchable 16 A. circuit breaker; connects primary power to power supplies.
2.
OPERATE
Push-button; turns on high voltage when all faults and heater delay are cleared.
3.
STANDBY
Push-button; biases grid off and turns off high voltage.
4.
ADJUST
Rotary knob used as an input device to change values of a variety of
parameters.
5.
EXIT
Push-button; terminates various menu selection routines and returns to the
previous menu level.
6-9.
S1...S4
"Soft Key" push buttons; various menu selection functions.
10.
Display
Displays numerous parameter values and fault messages.
11.
Keylock Switch
Allows operator to inhibit the TWTA, to enable front panel control, or to enable
computer control.
12.
Emergency switch cover
Provides access to emergency bypass switches, which permit manual control
of the amplifier.
Rev A
13
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