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DM240-DVB High-Speed Digital Modulator
Technical Specifications
7.0 Introduction
This section defines the technical performance parameters and specifications for the
DM240-DVB Digital Modulator.
7.1 IF Specification
Tx IF:
IF Step Size:
Frequency Stability:
Power Output:
Power Output Accuracy:
Power Output Stability:
Carrier Mute:
Spurious Emissions:
Output Impedance:
Return Loss:
Phase Noise:
Output Connector:
External Reference:
7.2 Baseband Specification
7.2.1 DVB-S
Compliance
Modulation Types:
Data Rate:
Symbol Rate:
Frame Size:
Terrestrial Framing:
Randomization for Energy Dispersal:
Outer Code:
Interleaver:
Inner Code:
TM083 – Rev. 3.0
50 to 90 MHz, 100 to 180 MHz (70/140 MHz),
950 to 1750 MHz (L-Band)
100 Hz
3 ppm
0 to -25 dBm
± 1.0 dB
± 0.5 dB
-55 dB
-55 dBc, 50 to 90 and 100 to 180 MHz (70/140 MHz),
950 to 2050 MHz (L-Band)
-45 dBc, all other frequencies
50 Ohm (L-Band), 75 Ohm (70/140 MHz)
20 dB (70/140 MHz), 14 dB (L-Band)
1 kHz -73 dBc
10 kHz -86 dBc
100 kHz -100 dBc
1 MHz -120 dBc
BNC Female (70/140 MHz), SMA Female (L-Band)
1 10 10 MHz in 8 kHz steps, better than 10 ppm
1.5 to 5 Vp-p, 50 Ohms
EN 300-421 and EN 301-210
BPSK, QPSK, 8PSK, 16QAM
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)
1 to 68 Msps in 1 sps steps
187 payload bytes, 1 sync byte, 16 parity bytes
204, 188, 187 (Unframed data)
Per EN 300-421
Reed-Solomon (204,188,T = 8)
Convolutional, I = 12
1/2, 2/3, 3/4, 5/6, 7/8 (BPSK, QPSK)
2/3, 5/6, 7/8 (8PSK)
3/4, 7/8 (16QAM)
Viterbi K = 7, G1 = 171oct G2 = 133oct
Technical Specifications
7
7-1
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