4 data (menu) – Comtech EF Data DMD-2050E User Manual
Page 128
DMD2050E Universal Satellite Modem
User Interfaces
MN-DMD2050E Revision 2
4–16
IF MENU
INPUT THRESHOLD
(dBm)
{-30 to –90}
Sets the minimum carrier receive level when a carrier drops
below this level. The modem will sweep and try to acquire a
new signal. This prevents extremely small carriers from falsely
locking the modem.
EB/NO ALARM
{0.0 – 9.9 dB}
Select an EB/NO level that will trigger an alarm when the
received EB/NO is worse.
4.4.2.4
DATA (menu)
DATA MENU
DATA RATE (bps)
Refer to Technical Specs
Set the Data Rate in bps steps via the
Front Panel Arrows or Keypad.
SYMB RATE (sps)
View the Symbol Rate.
INNER FEC
Viterbi
{1/2, 3/4, 7/8, None}
Optional FEC Rates:
Sequential
{1/2, 3/4, 7/8}
CSC
{3/4}
Trellis (8PSK)
{2/3}
TPC (BPSK)
{5/16, 21/44}
≤ 20Mbps
TPC (OQPSK/QPSK)
{1/2, 3/4, 7/8}
≤ 20Mbps
TPC (8PSK/8QAM)
{3/4, 7/8}
TPC (16QAM)
{3/4, 7/8}
DVB VIT
{2/3, 5/6}
DVB Trellis
{3/4, 5/6, 7/8, 8/9}
LDPC (B/O/QPSK)
{1/2, 2/3, 3/4}
LDPC (8PSK/8QAM)
{2/3, 3/4}
LDPC (16QAM)
{3/4}
EBEM (B/QPSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
EBEM (8PSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
EBEM (16APSK)
{1/2, 2/3, 3/4, 7/8, 19/20, None}
Select the Rx Code Rate and Type.
IFEC INTERLEAVER {DISABLE, ENABLE}
Disable or enable the IFEC Interleaver.
DIFF CODING
{ENABLED, DISABLE}
Enable or disable the Differential Decoder.
Having the decoder enabled ensures
proper phase lock. May not be adjustable
in some modes.