AR 10027190, Operating And Service Manual

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Models 200T18G26z5A/200T26z5G40A
Rev – 13
Menu screens - The screens at the highest level are called menu screens. There are seven menu screens. At
power on, the MENU 1 screen is displayed. Each of the menu screens has the soft key S4 labeled MORE.
The MORE key (S4) causes the next menu screen to appear. From MENU 7, MORE causes MENU 1 to
reappear. In short, MORE permits scrolling through the menu screens. The EXIT key returns display to
MENU 1 from any other menu screen.
The menu screens display system status and parameter levels. They are configured as follows:
MENU 1 Forward power (watts, dBm or bar graph)
Reverse power (watts, dBm or % of forward power)
System status (if a latched fault exists, MENU 1 is displayed with the system shutdown message)
MENU 2 Console hours (active when AC power is on)
Operate hours (active when HV is on)
MENU 3 Power Supply temperature (°C or °F)
TWT baseplate temperature (°C or °F)
MENU 4 Heater voltage (Ef), HPA #1
Heater current (If), HPA #1
Collector voltage (Eb), HPA #1
Grid voltage (Eg), HPA #1
Cathode voltage (Ek), HPA #1
Helix current (Iw), HPA #1
MENU 5 Heater voltage (Ef), HPA #2
Heater current (If), HPA #2
Collector voltage (Eb), HPA #2
Grid voltage (Eg), HPA #2
Cathode voltage (Ek), HPA #2
Helix current (Iw), HPA #2
Help Screens - On each of the menu screens, soft key S3 is labeled HELP. If S3 is selected, a message
describing the functions of that screen will be displayed. Use the ADJUST knob to scroll through the
message. The EXIT key will return you to the screen from which the help screen was called.
Setup Screens - From MENU 2, S1 (labeled SETUP) selects the first of several setup screens, SETUP 1. This
allows the user to manually shut off the heater power supply and put the HPA into Sleep Mode (see below).
Pressing S1 (SET) toggles between On and OFF. Pressing MORE again brings up the SETUP 2 screen,
which allows the user to change the Auto Sleep Mode timer setting. Pressing SET will change the timer
options in half hour increments from 0.5 to 3.0 hours. Pressing MORE again will save the timer setting and
bring up the SETUP 3 screen, which toggles the display of temperature parameters between Fahrenheit and
Celsius degrees. Pressing S1 (SET) changes the selection. The setting displayed when the screen is exited
will be retained. Pressing MORE again brings up the SETUP 4 screen, which allows a choice of displaying
forward power in watts, dBm or bar graph. Pressing MORE a third time brings up SETUP 5, which allows a
choice of watts, dBm, or % of forward power for displaying reverse power. MORE brings up SETUP 6,
which allows entering the desired number of alarm beeps and the desired beep volume. S1 (SET) toggles
between parameters, and the adjust knob is used to enter the data. Setup 7 allows the IEEE-488 address to be
set. MORE returns you to SETUP 1. EXIT returns you from any of the setup screens to MENU 2.
Sleep Mode - 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.