DM240XR High-Speed Digital Modulator
Technical Specifications
TM120 – Rev. 1.1
7-1
Technical Specifications
7
7.0 Introduction
This section defines the technical performance parameters and specifications for the
DM240XR Digital Modulator.
7.1 IF Specification
Tx IF:
50 to 90 MHz, 100 to 180 MHz (70/140 MHz),
950 to 2050 MHz (L-Band)
IF Step Size:
100 Hz
Frequency Stability:
3 ppm
Power Output:
0 to -25 dBm
Power Output Accuracy:
± 1.0 dB
Power Output Stability:
± 0.5 dB
Carrier Mute:
-55 dB
Spurious Emissions:
-55 dBc, 50 to 90 and 100 to 180 MHz (70/140 MHz),
950 to 2050 MHz (L-Band)
-45 dBc, all other frequencies
Output Impedance:
50 Ohm (L-Band), 75 Ohm (70/140 MHz)
Return Loss:
20 dB (70/140 MHz), 14 dB (L-Band)
Phase Noise:
1 kHz -73 dBc
10 kHz -86 dBc
100 kHz -100 dBc
1 MHz -120 dBc
Output Connector:
BNC Female (70/140 MHz), SMA Female (L-Band)
Monitor Port Output Connector:
SMA Female (Based on output frequency)
External Reference:
1 to 10 MHz in 8 kHz steps, better than 10 ppm
1.5 to 5 Vp-p, 50 Ohms
7.2 Baseband Specification
7.2.1 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:
1/2, 2/3, 3/4, 5/6, 7/8 (BPSK)
1/2, 2/3, 3/4, 5/6, 7/8 (QPSK
2/3, 5/6, 8/9 (8PSK)
3/4,
7/8
(16QAM)
Viterbi K = 7, G1 = 171oct G2 = 133oct
Summary of Contents for DM240XR
Page 2: ......
Page 10: ...Table of Contents DM240XR High Speed Digital Modulator x TM120 Rev 1 1 ...
Page 12: ...Introduction DM240XR High Speed Digital Modulator 1 2 TM120 Rev 1 1 ...
Page 16: ...Installation DM240XR High Speed Digital Modulator 2 4 TM120 Rev 1 1 ...
Page 19: ...DM240XR High Speed Digital Modulator Theory of Operation TM120 Rev 1 1 3 3 ...
Page 55: ...User Interfaces DM240XR High Speed Digital Modulator 4 36 TM120 Rev 1 1 ...
Page 67: ...Rear Panel Interfaces DM240XR DVB High Speed Digital Modulator 5 12 TM120 Rev 1 1 ...
Page 69: ...Maintenance and Troubleshooting DM240XR High Speed Digital Modulator 6 2 TM120 Rev 1 1 ...
Page 79: ...Technical Specifications DM240XR High Speed Digital Modulator 7 10 TM120 Rev 1 1 ...
Page 103: ...Appendix A DM240XR High Speed Digital Modulator A 24 TM120 Rev 1 1 ...
Page 124: ...DM240XR High Speed Digital Modulator Appendix B TM120 Rev 1 1 B 21 ...