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DMD15/DMD15L IBS/IDR Satellite Modem User Interfaces
TM051 - Rev. 5.8 4-7
Mod Data (menu):
Data Rate: {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.
Symbol Rate: Allows the user to view the Symbol Rate.
Conv Enc: {1/2 Rate VIT, 3/4 Rate VIT, 7/8 Rate VIT,
Optional encoders: 1/2 Rate SEQ, 3/4 Rate SEQ , 7/8
Rate SEQ , 2/3 Rate TRE (8PSK), Turbo (.793), Turbo
(.495), 3/4 Rate CSC}
Allows the user to select the Tx Code Rate and Type.
Diff Encode: {On, Off, EF Mode*}
Allows the user to enable or disable the Differential
Encoder. Having the encoder enabled ensures proper
phase lock.
*EF Mode is a special differential encoder mode that
allows compatibility with certain modems when
configured in QPSK modulation, and uncoded FEC.
Scrmbl Sel: {None, V.35-IESS, V.35 CITT, V.35 EF, IBS, CCITT,
V.35FC, OM73, V.35EF_RS, TPC SCRAMBLER(Turbo
Codec)}
Allows the user to select the scrambler type.
Scrmbl Ctrl: Allows the user to enable or disable scrambler operation.
Mod Framing: {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), None}
Used with IDR, IBS, or Asynchronous Interface Only.
Allows the user to select the framing type.
Data Invert: {Terr, Base, Terr & Base}
Allows the user to invert the Tx Data polarity.
Symbol Pair: {None, Swapped}
Allows the user to swap the I&Q Channels.
(BPSK Mode Only)
Reed-Solomon (menu):
These selections are visible only when the Reed-
Solomon Option is installed.
Enable/Disable {Enable, Disable}
Allows the user to Enable/Disable the Reed-Solomon
Encoder.
RS Codes {Refer to Appendix A for valid n/k values}
Displays the currently used n, k Reed-Solomon Codes.
In Closed Net Mode, the user may select custom RS
Codes.
RS Depth {4, 8}
Allows the user to select the Reed-Solomon interleaver
depth. In Closed Net Mode, a depth of 4 or 8 may be
selected.