AR 10037990, Operating And Service Manual, Page: 32 / 54

Model 250T6G18
12 Rev A
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. Front Panel Features
Table 3-1. Front Panel Features
Item Title Function
1 MAIN POWER Switchable 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 COVER Provides access to emergency bypass switches, which permit manual control of the amplifier.