Operating instructions

Installation DMD50 Universal Satellite Modem
2-4 TM118 – Rev. 1.1
Implementing Strap Code 26 can set the following modem configuration.
Refer to Table 4-4 for an explanation and tabular listing of available Strap
Codes. The Frequency and Modulator Output Power are set
independently of the strap code.
Standard Factory Configuration Settings
Modulator:
Data Rate: 2.048 Mbps
Mode: Closed Network
Satellite Framing: None
Scrambler: V.35 (IESS)
Drop and Insert: Disabled
Inner FEC: 1/2 Rate Viterbi
Outer FEC: Disabled
Modulation: QPSK
Frequency: 70.000000 MHz
Modulator Output Power: -20 dBm
Demodulator:
Data Rate: 2.048 Mbps
Mode: Closed Network
Satellite Framing: None
Scrambler: V.35 (IESS)
Drop and Insert: Disabled
Inner FEC: 1/2 Rate Viterbi
Outer FEC: Disabled
Modulation: QPSK
Frequency: 70.000000 MHz
To lock up the modem, enter ‘IF Loopback Enable’ under the Test Menu, or connect a Loopback
Cable from J11 to J13 on the rear panel of the modem.
Usage of the modems loopback capabilities in conjunction with the
Ethernet data interface can produce undersirable network loops. In order
to run any type of data test with an Ethernet interface you must utilize
two modems connected back to back. Simply using one modem and a
loopback will not produce the desired results.