Comtech EF Data DMD50 Installation And Operation Manual page 91

DMD50 Universal Satellite Modem
COMPENSATION
DATA (menu)
DATA RATE (bps)
SYMB RATE (sps)
INNER FEC
TPC INTERLEAVER
DIFF CODING
SCRAMBLER SEL
SCRAMBLER CTRL
SAT FRAMING
MN-DMD50– Revision 3
{0.0 – 1.0}
Allows you to offset output power by up to 1 dbm. This is
intended as a correction for user cabinet connectors.
{Refer to Technical Specs for Data Rates}
Allows the user to set the Data Rate in bps steps via the Front
Panel Arrows or Keypad.
Allows the user to view the Symbol Rate.
Viterbi
Optional FEC Rates:
Sequential
Trellis
Turbo ≤ 20Mbps
Turbo >20Mbps
CSC
DVB VIT
DVB Trellis
LDPC (B/O/QPSK)
LDPC (8PSK)
LDPC (8QAM)
LDPC (QPSK/OQPSK) {1/2, 2/3, 3/4}
LDPC (16QAM)
Allows the user to select the Rx Code Rate and Type
{DISABLE, ENABLE}
Allows user to disable or enable the TPC Interleaver. Valid only
for Radyne turbo codes TPC.495 and TPC.793
{ENABLED, DISABLE}
Allows the user to enable or disable the Differential Encoder.
Having the encoder enabled ensures proper phase lock. May not
be adjustable in some modes.
{NONE, V.35-IESS, V.35 CITT, V.35 EF, IBS w/Optional
Framing and optional Reed-Solomon, Reed-Solomon
Scrambler w/Optional Framing, CCITT, V.35FC, OM-73,
V.35EF_RS, TPC SCRAMBLER (Turbo Codec), DVB,
EDMAC}
Allows the user to select the descrambler type.
{ENABLED, DISABLE}
Allows the user to enable or disable scrambler operation.
{1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), DVB, EDMAC,
EFAUPC, SCC, EFFICIENT D&I, None}
Used with IDR, IBS, or Asynchronous Interface Only.
Allows the user to select the framing type.
{1/2, 3/4, 7/8, None}
{1/2, 3/4, 7/8}
{8PSK}
{.793, .495, 3/4, 7/8}
{.750, .875}
{3/4}
{2/3, 5/6}
{3/4, 5/6, 7/8, 8/9}
{1/2, 2/3, 3/4}
{2/3, 3/4}
{2/3, 3/4}
{3/4}
User Interfaces
4–7