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DMD50 Universal Satellite Modem
2.5
Modulator Checkout
The following descriptions assume that the unit 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 unit, 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:
Baud Rate:
Data Bits:
Parity:
Stop Bits:
MN-DMD50 Revision 4
VT-100 (can be changed)
19.2 K (Can be changed via Front Panel)
8
No Parity (Fixed)
1 Stop Bit
Installation
2–4
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