AR 10013130, Руководство по эксплуатации и обслуживанию

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Model 2000TP2G8B
Rev - 17
The Sleep Mode feature allows the user to selectively shut off the heater module of the power supplies. This
can be done manually through the front panel or remotely via the computer interface. This is typically used
during extended periods of
remote operation to improve tube life, by turning off the filaments (Sleep Mode
activated). This eliminates excessive STANDBY hours on the TWTs while still permitting remote capability
to turn on the amplifier.
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 deactivate Sleep Mode:
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.
Warnings Screens - From MENU 3, S1 (labeled WARNINGS) selects WARNINGS 1 which allows the
operator to enter the maximum forward peak 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 peak power exceeds the setpoint, the audible alarm will sound (if configured in
SETUP 5).
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 peak 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 peak 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.
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.
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 3, 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.