AR 10012510, Руководство по эксплуатации и обслуживанию

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Model 200T8G18A/250T8G18
14 Rev D
To activate Sleep Mode locally:
Press the MORE soft key to get to MENU 2. At MENU 2 press the SETUP soft key to get to SETUP 1. At
SETUP 1 press SET to activate Sleep Mode (turn heater and fan off). The system will ask,
Are you sure?
Press SET again.
After activating the Sleep Mode:
Screen will display Cooling On while heaters cool down. System Off notifies user that the amplifier is in
Sleep Mode
To de-Activate Sleep Mode locally:
Press the ON soft key to de-activate Sleep Mode. Amplifier will return to MENU 1. When de-activating the
Sleep Mode the heaters will require approximately a 5 minute heater time delay. Wait the full 5 minutes prior
to selecting OPERATE.
For remote activation of Sleep Mode or to set the Auto Sleep Mode timer remotely see Table 3-3 in Section
3.8.
Warnings Screens - From MENU 3, S1 (labeled WARNINGS) selects WARNINGS 1 which allows the
operator to enter the maximum forward power. The existing value is between brackets[]; pressing SET puts
arrows >< around the value, indicating that the adjust knob is active. The effect of the warning setpoint is as
follows: if the forward power exceeds the setpoint, the audible alarm will sound (if configured in SETUP 3).
This warning will be repeated every thirty seconds until the over forward power condition is cleared. In
addition, a warning message will appear on line 3 (the status line) of MENU 1. In the event that the alarm is
heard, the operator should go to MENU 1 to determine the cause.
Pressing more brings up WARNINGS 2, which allows the under forward power setpoint to be entered.
Adjusting this to the minimum value causes -OFF- to be selected, disabling this alarm.
In WARNINGS 3, the maximum reverse power level is set. Note that these are warning levels at which the
beep sounds; the actual maximum reverse power level that generates a system fault is set in hardware in the
TWT power supply HPA Logic and Control module (A16485-000).
MORE brings up WARNINGS 4, which allows input of the maximum cabinet temperature. Entering this
parameter is performed as above.
MORE brings up WARNINGS 5, identical to the previous screen except that it deals with the maximum TWT
collector block temperature. If either parameter exceeds the setpoint, the audible alarm will sound every 30
seconds (if configured), and a warning message will appear on line 3 of MENU 1.
From WARNINGS 5, MORE brings up WARNINGS 6, which permits setting the maximum helix current.
Any helix current above this setpoint will result in an audible alarm (if configured), repeated every 30
seconds; and a warning message is displayed on the status line of MENU 1.
Pressing MORE again returns display to WARNINGS 1. As before, pressing EXIT from any of the warnings
screens returns display to MENU 3.
Info Screen - From MENU 2, S2 (labeled INFO) selects a screen that displays the RF sample port calibration
factors at various frequencies across the band. In addition, this screen displays the model number, serial
number and firmware revision information that may be required by a service representative when providing
technical assistance. The EXIT key returns the display to MENU 2.