Specifications

DMD20/20LBST Universal Satellite Modem User Interfaces
MN-DMD20-20LBST Revision 14 4–18
ROTATION AMBIG {n (x.x.x)}, n=0..7, x=0 or 1 (8PSK Only)
Allows the user to manually set the rotational ambiguity of the
uncoded* 8PSK constellation. This will force the rotation to one
of the eight possible states after demodulator lock.
*This is not a normal mode of operation for the modem.
TPC INTERLEAVER {DISABLED, ENABLED}
Allows the user to disable or enable TPC Interleaver. Valid only
for Radyne Legacy turbo codes TPC.495 and TPC.793.
DIFF CODING {ENABLED, DISABLE}
Allows the user to enable or disable the Differential Decoder.
Having the decoder enabled ensures proper phase lock. May
not be adjustable in some modes.
SCRAMBLER SEL {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.
SCRAMBLER CTRL {ON, OFF}
Allows the user to enable or disable the descrambler operation.
SAT FRAMING {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), EDMAC, EFAUPC,
SCC, EFFICIENT D&I, None}
Used with IDR, IBS, or Asynchronous Interface Only.
Allows the user to select the Framing Type.
IN-BAND RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200}
Allows the user to select the rate of in-band data for the ES to
ES, Async overhead channel. Only displayed when Efficient
D&I with Esc Enhanced are selected.
SCC CTL RATIO {1/1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/7}
Allows the user to simulate the framing used by the Satellite
Control Channel Option (Pass Thru Mode only). The SCC CTL
RATIO is the ratio of overhead in-band data to synchronizing
words.
Only displayed when SCC Framing is selected.
SCC INBAND RATE {300 to 115200},
Allows the user to request the rate of in-band data for the
overhead channel.
Only displayed when SCC Framing is selected.
TERR FRAMING {NONE, 188, 204}, when using DVB Network Spec
DATA POLARITY {INV. TERR & BASE, INV. BASEBAND, INV.TERR DATA, INV.
NONE}
Use DATA POLARITY to invert the Rx Data polarity if necessary.
If other brands of equipment are used with this unit, data polarity
inversion may be required.