Comtech EF Data DM240XR User Manual
Page 86
DM240XR High-Speed Digital Modulator
Technical Specifications
MN-DM240XR– Revision 13
7–2
7.3
Baseband Specification
7.3.1 DVB-S
Compliance
EN 300-421 and EN 301-210
Modulation Types:
BPSK, QPSK, 8PSK, 16QAM
Data Rate:
1 to 59.5 Mbps in 1 bps steps (BPSK)
1 to 119 Mbps in 1 bps steps (QPSK)
2 to 181 Mbps in 1 bps steps (8PSK)
3 to 238 Mbps in 1 bps steps (16QAM)
Symbol Rate:
1 to 68 Msps in 1 sps steps
Frame Size:
187 payload bytes, 1 sync byte, 16 parity bytes
Terrestrial Framing:
204, 188, 187 (Unframed data)
Randomization for Energy Dispersal:
Per EN 300-421
Outer Code:
Reed-Solomon (204,188,T = 8)
Interleaver:
Convolutional, I = 12
Inner Code:
(BPSK): 1/2, 2/3, 3/4, 5/6, 7/8
(QPSK): 1/2, 2/3, 3/4, 5/6, 7/8
(8PSK): 2/3, 5/6, 8/9
(16QAM): 3/4, 7/8
Viterbi K = 7, G1 = 171oct G2 = 133oct
Baseband Roll-Off:
Square Root Raised Cosine
0.35 (BPSK, QPSK, 8PSK, 16QAM)
0.25 (8PSK, 16QAM)
0.20 (BPSK, QPSK)
Terrestrial Input Clock Accuracy:
400 ppm (Maximum)
Test Pattern:
Internal 2
15
-1 and 2
23
-1 Pseudo-Random Number
Generators
7.3.2 DVB-S2-CCM (CCM - Normative)
Compliance
ETSI EN 302 307 v1.1.1 (normative)
Modulation Types:
QPSK, (8PSK, 16APSK & 32APSK Optional)
Transport Streams
Single MPEG Packetized Transport Streams
Data Rate:
(QPSK): 1 to 54 Mbps in 1 bps steps
(8PSK): 2 to 118 Mbps in 1 bps steps
(16APSK): 2.6 to 160 Mbps in 1 bps steps
(32APSK): 3.5 to 200 Mbps in 1 bps steps
Symbol Rate:
1 to 45 Msps in 1 bps steps
Terrestrial Framing:
188 (1 sync byte, 187 payload bytes)
Baseband Processing:
Per ETSI EN 302 307 v1.1.1
Block Size:
64800 bits & 16200 bits
FEC Code:
BCH + LDPC
Interleaver:
Block Interleaver, per ETSI EN 302 307 v1.1.1
Inner Code Rate:
(QPSK): 1/4, 1/3, 2/5, 1/2, 2/3, 3/5, 3/4, 4/5, 5/6, 8/9,
9/10
(8PSK): 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
Optional
(16APSK): 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 Optional
(32APSK): 3/4, 4/5, 5/6, 8/9, 9/10
Optional
Baseband Roll-Off
Square Root Raised Cosine
0.20