Comtech EF Data DD240XR Rev Е - Manual (Page 108)

Technical Specifications DD240XR High-Speed Digital Demodulator
7-2 MN-DD240XR – Rev. E
Forward Error Correction (FEC) Decoding
Inner Code:
PTCM (8PSK, 16QAM), Viterbi (QPSK)
Code Rates: 1/2, 2/3, 3/4, 5/6, 7/8 (QPSK)
2/3, 5/6, 8/9 (8PSK)
3/4, 7/8 (16QAM)
Outer Code: Reed-Solomon, Per EN 300-421
(204, 188, T=8)
Deinterleaving: Convolutional, I=12, Per EN 300-421
Data Descrambling: Per EN 300-421
Terrestrial Framing Modes: 204, 188, 187
Internal Clock Source Stability: 10 ppm
Internal Doppler Buffer: 0 – 64 msec, G.703 Interface
7.3.1 DVB-S2-CCM
Compliance ETSI EN 302 307 v1.1.1 (Broadcast Services Only)
Modulation Types: QPSK, 8PSK, 16APSK
Data Rate: Normal FEC Frames:
QPSK: 1 to 80 Mbps in 1 bps steps
8PSK: 3.9 to 120 Mbps in 1 bps steps
16APSK: 5.3 to 160 Mbps in 1 bps steps
Short FEC Fames:
QPSK: .75 to 77. Mbps in 1 bps steps
8PSK: 3.8 to 116 Mbps in 1 bps steps
16APSK: 5.1 to 153 Mbps in 1 bps steps
Symbol Rate: 2 to 45 Msps in 1 sps steps
Terrestrial Framing: 188 (1 sync byte, 187 payload bytes)
Baseband Processing: Per ETSI EN 302 307 v1.1.1
Block Size: 64.8 Kbits or 16.2 Kbits
FEC Code: BCH + LDPC
De-Interleaver: Block Interleaver, per ETSI EN 302 307 v1.1.1
Inner Code Rate: QPSK - 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 (Normal
Frames)
8PSK - 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 (Normal Frames)
16APSK - 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 (Normal Frames)
Baseband Roll-Off Square Root Raised Cosine
0.20, 0.25, 0.35
7.4 Configuration Series DVB-S
Series 100:
2 - 10 Msps, QPSK
Series 200: 2 - 45 Msps, QPSK
Series 300: 2 - 45 Msps, QPSK / 8PSK
Series 350: 2 - 45 Msps, QPSK / 8PSK / 16QAM