Comtech EF Data LBC-4000 - Manual (Page 60)

LBC-4000 L-Band Up/Down Converter System with Ethernet Revision 2
Front Panel Operation MN-LBC4000A
5–4
5.1.4 Vacuum Fluorescent Display (VFD)
The LBC‐4000 features a Vacuum Fluorescent
Display (VFD). The VFD is an active display
showing two lines of 24 characters each. It
produces a blue light with a user‐adjustable
brightness. Compared to a Liquid Crystal Display (LCD), it provides superior viewing
characteristics and does not suffer problems of viewing angle or contrast.
5.1.4.1 Opening Screen
LBC-4000
Ver: X.X.X SN:XXXXXXXXX
This screen is displayed whenever power is first applied to the unit. After turning on the prime
power, this VFD ‘splash’ display indicates the converter model number – i.e., ‘LBC‐4000’ – along
with the version number of the installed firmware, and the serial number assigned to the unit in
use.
On most menu screens, you will observe a flashing solid block cursor, which blinks at a once‐per‐
second rate. This indicates the currently selected item, digit, or field. Where this solid block
cursor would obscure the item being edited (e.g., a numeric field) the cursor will automatically
change to an underline cursor. Press any key to restore the previous screen.
You may access the opening screen from any location within the LBC‐4000 menu structure by
pressing the [CLR] key repeatedly. Otherwise, press any key to access the top‐level (main) menu.
5.1.4.2 Screen Saver
If you were to display the same screen for weeks at a time, the display could become ‘burnt’
with this image. To prevent this, the unit has a ‘screen saver’ feature, which will activate after 1
hour. The top line of the display will display the user‐definable circuit ID, and the bottom line will
display ‘Press any key...’. The message moves from right to left across the screen, and
then wraps around. Press any key to restore the previous screen.