AR 10037990, Руководство по эксплуатации и обслуживанию, Страница: 34 / 54

Model 250T6G18
14 Rev A
Menu screens - The screens at the highest level are called menu screens. There are four 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 4, 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 (bar graph, watts, or dBm)
Reverse power (bar graph, watts, dBm or % 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 Cabinet temperature (°C or °F)
TWT baseplate temperature (°C or °F)
MENU 4 Heater voltage (Ef)
Heater current (If)
Collector voltage (Eb)
Grid voltage (Eg)
Cathode voltage (Ek)
Helix current (Iw)
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 five 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 strip chart form, or in
dBm or watts. Pressing MORE a third time brings up SETUP 5, which allows a choice of dBm, watts, 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. Setup 8 allows selecting between pulsed or
CW operation. The SET button toggles between the two. 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.