Comtech EF Data CDM-600/600L - Manual (Page 46)

CDM-600/600L Open Network Satellite Modem Revision 3
Introduction MN/CDM600L.IOM
1–18
1.5 Summary of Specifications
All specifications are typical for the CDM-600L and CDM-600 unless otherwise indicated.
1.5.1 Modulator
Modulation BPSK, QPSK, OQPSK, 8-PSK, 8-QAM and 16-QAM
Symbol rate range 4.8 ksps to 10.0 Msps
Data rate range See Section 1.5.5
Operating modes • Open Network, per Intelsat IESS-308/309/310/314 (IDR, IBS/SMS)
• E1/T1 Drop and Insert
• Transparent, Closed Network, IESS-315 (VSAT Turbo)
• Proprietary EDMAC framed mode:
o 5% overhead - all modes except BPSK Turbo, Rate 1/2 OQPSK Turbo, and data rates < 2.048 Mbps
o
1.5% overhead - Rate 21/44, 5/16 Turbo, Rate 1/2 OQPSK Turbo, and all other rates >2.048 Mbps
• R-S Outer Codec
• Turbo Product Codec – Low Rate, 1
st Generation (optional):
o Rate 5/16 BPSK
o
Rate 21/44 BPSK
o
Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM
• Turbo Product Codec – High Rate, 2 nd Generation (optional):
o Rate 21/44 BPSK
o
Rate 5/16 BPSK
o
Rate 1/2 QPSK/OQPSK (exact Code Rate is actually 0.477)
o
Rate 3/4 QPSK/OQPSK/8-PSK/16-QAM
o Rate 7/8 QPSK/OQPSK/8-PSK/16-QAM
o
Rate 0.95 QPSK/OQPSK/8-PSK (exact Code Rate is actually 0.944)
• LDPC Codec (optional – includes all 2 nd Generation TPC modes):
o
Rate 1/2 BPSK/QPSK/OQPSK
o Rate 2/3 QPSK/OQPSK/8-PSK/8-QAM
o Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM
• Automatic Uplink Power Control (AUPC) mode
• High Rate ESC: [CDM-600L] FAST
[CDM-600] FAST, with Firmware Ver. 1.3.1 or higher
• ESC++: [CDM-600L] with Firmware Ver.1.3.0 or higher
[CDM-600] with Firmware Ver. 2.0.1 or higher
• Drop & Insert ++ : [CDM-600L] with Firmware Ver. 1.2.0 or higher and with D&I FAST option
[CDM-600] with Firmware Ver. 1.5.0 or higher
Tx filtering Per INTELSAT IESS-308 (FIR digital filter implementation)
Scrambling • IDR Mode, no R-S - per ITU V.35 (Intelsat variant)
• IBS mode, no R-S - per IESS-309, externally frame synchronized
• Transparent Closed Network mode, no R-S or Turbo coding - per ITU V.35 (Intelsat variant)
• EDMAC mode, no RS coding - externally frame synchronized - proprietary
• Turbo Product Code mode - externally frame synchronized - proprietary
• All R-S modes - externally frame synchronized per IESS-308/-309/-310