Comtech EF Data DMDVR20 LBST Rev 1.1 - Manual (Page 20)

DMDVR20 LBST Satellite Modem Installation
TM136 – Rev. 1.1 2-5
2.5 Modulator Checkout
The following descriptions assume that the modem is installed in a suitable location with prime
AC power and supporting equipment available.
2.5.1 Initial Power-Up
Before initial power up of the modem, it is a good idea to disconnect the
transmit output from the operating ground station equipment. This is
especially true if the current Modulator Configuration Settings are
unknown, where incorrect settings could disrupt the existing
communications traffic. New units from the factory are normally shipped
in a default configuration which includes setting the transmit carrier off.
Turn on the unit by placing the Rear Panel Switch (located above the power entry connector) to
the On Position. Upon initial and subsequent power-ups, the Microprocessor will test itself and
several of its components before beginning its Main Monitor/Control Program. These power-up
diagnostics show no results if successful. If a failure is detected, the Fault LED will illuminate.
The initial field checkout of the modem can be accomplished from the Front Panel or in the
Terminal Mode. The Terminal Mode has the advantage of providing full screen access to all of
the modem’s parameters, but requires a separate terminal or computer running a Terminal
Program. The Terminal Mode is enabled from the front panel in the System M&C Submenus.
2.5.2 Factory Terminal Setup
The factory terminal setup is as follows:
Emulation Type: VT-100 (can be changed)
Baud Rate: 19.2 K (Can be changed via Front Panel)
Data Bits: 8
Parity: No Parity (Fixed)
Stop Bits: 1 Stop Bit
2.6 Storage
It is recommended that the unit be stored in its original sealed packing. The unit should be stored
in a dry location where the temperature is stable, away from direct contact with rain, snow, wind,
sun, or anything that may cause damage.