Comtech EF Data DMDVR20 LBST Rev 1.1 User Manual
Page 19
Installation
DMDVR20 LBST Satellite Modem
2-4
TM136 – Rev. 1.1
Standard Factory Configuration Settings
Modulator:
Data Rate:
2.048 Mbps
Mode: Closed
Network
Frequency: 1200
MHz
Modulation:
QPSK
Inner FEC:
1/2 Rate Viterbi
Satellite Framing:
None
Scrambler: V.35
(IESS)
Reed Solomon:
Disabled
Modulator Output Power:
-20 dBm
Demodulator:
Data Rate:
2.048 Mbps
Mode: DSS
Frequency: 1200
MHz
Modulation:
QPSK
Inner FEC:
1/2 Rate LDPC
Satellite Framing:
S2 Short
Terrestrial Framing:
None
Pilot Symbols:
Disabled
Usage of the modems loopback capabilities in conjunction with the
Ethernet data interface can produce undesirable 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.