Specifications

DMD20/20LBST Universal Satellite Modem User Interfaces
MN-DMD20-20LBST Revision 14 4–15
4.4.3 Demodulator Menu Options and Parameters
NETWORK SPEC {IDR, IBS, DROP & INSERT, DVB SAT, LDPC, CLOSED NET}
The Network Spec Command sets a number of parameters
within the modem to meet a specification. The purpose is to
eliminate keystrokes and potential compatibility problems.
Data rates not covered by a given mode will not be allowed. If
the mode of operation is selected after the data rate has been
entered, then the data rate must be compatible with the desired
mode of operation or the Network Spec will not be allowed. The
following parameters cannot be changed while the unit is in the
given mode of operation:
IDR:
(IESS-308)
For Data rates 1.544, 2.048, 6.312, 8.448 Mbps
Framing Type: 96 Kbps (IDR)
Descrambler type: V.35
Spectrum Mask: Intelsat
For Data Rates < 1.544 Mbps
Framing Type: 1/15 (IBS)
Descrambler Type: IESS-309
Spectrum Mask: Intelsat
IBS:
(IESS-309)
For Data Rates <
2.048 Mbps
Framing Type: 1/15 (IBS)
Descrambler Type: IESS-309
Spectrum Mask: Intelsat
Drop & Insert:
Data Rates: n x 64, n = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15,
16, 20, 24, 30
Framing Type: 1/15 (IBS)
Descrambler Type: IESS-309
Spectrum Mask: Intelsat
Efficient D&I Closed Network,
Data Rates: n x 64, 1-31 Any combination
Descrambler Type: IESS-309
Spectrum Mask: Intelsat
DVB: Per EN301-421 & En301-210
Data Rates: All Rates
Framing Type: DVB
Scrambler Type: DVB
Spectrum Mask: DVB 0.25, 0.35