Comtech EF Data SDM-2020 - Manual (Page 23)

2-1
Chapter 2. SPECIFICATIONS
2.1 S
PECIFICATIONS
2.1.1 G
ENERAL
S
PECIFICATION
Table 2-1. General Specifications
Parameter Specification
Transmission Format QPSK per EN 300 421
8PSK per prEN 301 210, optional
16QAM per prEN 301 210, optional
Data Rate/Symbol Rate 1.5 to 100 Mbit/s, in 1 bit/s steps, depending upon symbol rate and data interface.
Refer to Chapter 1 for the appropriate Data Rate.
Equivalent Serial Data Rate at
96 pin DIN
Framing 187
188
204
Framing
Data Rate = SR x m x CRv x (187/204), ≤ 100 Mbit/s
Data Rate = SR x m x CRv x (188/204), ≤ 100 Mbit/s
Data Rate = SR x m x CRv x (204/204), ≤ 100 Mbit/s
m = 2 QPSK, 3 8PSK, 4 16QAM
CRv = Viterbi/trellis code rate
CRrs = Reed-Solomon code rate
Data Rate Tolerance Programmed rate ± 100 ppm
Modulation Type and Inner
Code Rate QPSK: 1/2, 2/3, 3/4, 5/6, 7/8
8PSK: 2/3, 5/6, 8/9
16QAM: 3/4, 7/8
Outer Code Rate
(Reed-Solomon) RS (204, 188, t = 8)
Interleaving Depth 12, per EN 300 421 and prEN 301 210
Spectral Shaping Square-root raised cosine, α = 0.35 per EN 300 421 and prEN 301 210