Front Panel Vacuum Fluorescent Display (Vfd); Opening Screen - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Front Panel Operation
5.1.3

Front Panel Vacuum Fluorescent Display (VFD)

user. Compared to a Liquid Crystal Display (LCD), it has greatly superior viewing characteristics
and does not suffer problems of viewing angle or contrast.
5.2

Opening Screen

For purposes of this documentation, a CDM-710 (70/140 MHz) unit is shown;
the unit in use could be either a CDM-710 70/140 MHz or CDM-710L L-Band
Broadcast Satellite Modem.
IMPORTANT
As shown above, the 'welcome screen' is displayed whenever power is first applied to the unit.
The top line identifies the unit model (i.e., CDM-710 as shown, or CDM-710L); the bottom line
displays the CDM-710's installed Firmware Version (version number varies).
Pressing any key takes the user to the top-level Select menu. On most menu screens, users will
see a flashing, solid-block cursor that blinks at a once-per-second rate. This indicates the
currently selected item, digit, or field:
CONFIG: Remote
Int1 Int2 Ref Aux Alarms
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:
Tx Freq: 0140.0000 MHz
To prevent the display from becoming burnt by a constant image, the unit employs a screen saver
feature that activates after one hour and constantly scrolls and wraps a message across the screen.
The top line of the screen saver display shows the Circuit ID, which is user-configurable; the
bottom line displays the message 'Press any key...' as shown:
Circuit ID:--------------
---Press any key...
Press any key to restore the previously active screen.
The CDM-710 features a Vacuum Fluorescent
Display (VFD). The VFD is an active display showing
two lines of 24 characters each. It produces a blue
light, the brightness of which can be controlled by the
The opening 'welcome screen' shown here is
representative of what displays whenever power is
first applied to the unit (the Firmware Version may
differ). Pressing any key takes the user to the top-level
Select menu.
Tx Rx
(◄ ► ▲ ▼ ENTER)
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Revision 11
MN/CDM710.IOM