Features; Physical Description; Front Panel; Rear Panel - Comtech EF Data CDM-625 Installation And Operation Manual

CDM-625 Advanced Satellite Modem
Introduction
1.3

Features

1.3.1

Physical Description

The CDM-625 is co
Rack handles at the front e
1.3.1.1

Front Panel

1-2 shows the front panel of the modem. The front panel features (from left): eight LED
F igure
indicators; a keypad; and a Vacuum Fluorescent Display (VFD). 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.
The VFD is an active display showing two lines of 40 characters each. It produces a blue light
with adjustable brightness. Compared to a Liquid Crystal Display (LCD), the VFD has
s uperior viewing characteristics and does not suffer problems of viewing angle or contrast.
The keypad comprises six individual keysw
membrane overlay. They have a positive 'click' action, which provides tactile feedback.
The function and
Chapter 5. FRONT PANEL OPERATION.

1.3.1.2 Rear Panel

Figure 1-3 shows the rear panel of the modem. External cables are attached to connectors on the
rear panel of the CDM-625. Each connector is described in detail in Chapter 3. REAR PA NEL
CONNECTOR PINOUTS. They comprise:
nstructed as a 1RU high rack-mount chassis, which can be free-standing.
ase removal from and placement into a rack.
LED
Keypad
Indicators
Figure 1-2. CDM-625 – Front Panel View
behavior of the LED indicators, keypad, and VFD is described in detail in
Figure 1-3. CDM-625 – Rear Panel
MN-0000036 (Ref MN/CDM625.IOM)
Vacuum Fluorescent
Display (VFD)
itches, mounted directly behind a fully sealed
View
1–3
Revision 1
greatly