Comtech EF Data CDM-700 - Manual (Page 42)

CDM-700 High Speed Satellite Modem Revision 5
Physical Description MN/CDM700.IOM
4.2 Front Panel
The CDM-700 front panel features a Vacuum Fluorescent Display (VFD), a keypad, eight Light-
Emitting Diode (LED) indicators, and a Universal Serial Bus (USB) port. The user enters data via
the keypad, and messages are displayed on the VFD. The LEDs indicate, in a summary fashion,
the status of the unit.
Vacuum Fluorescent Display (VFD) The VFD is an active display showing two lines with 24
characters per line. It produces a blue light, the brightness of
which can be controlled by the user. It has greatly superior
viewing characteristics compared to a Liquid Crystal Display
(LCD), and does not suffer problems of viewing angle or
contrast.
Initially Released Chassis Keypad
The keypad for the initially released chassis features six
individual keyswitches mounted directly behind a fully sealed
membrane overlay. They have a positive‘click’ action that
provide the user with tactile feedback.
These six switches are identified as [
↑], [↓], [→], [←] arrows,
ENT (Enter) and CLR (Clear). The functions of these keys
are described in Chapter 6. FRONT PANEL OPERATION.
Rev. A and Later Chassis Keypad
The keypad for the Rev. A and later chassis features six
individual protruding black buttons. They have a positive‘click’
action that provide the user with tactile feedback.The later
keypad function is the same as the earlier keypad.
LED Indicators
There are eight LEDs on the front panel. The behavior of
these LEDs is described in Chapter 6. FRONT PANEL
OPERATION.
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