QAM256 Digital Video Modulator and Upconverter Technical Specifications
TM077 – Rev. 4.0 7-1
Technical Specifications
7
7.0 Introduction
This section defines the technical performance parameters and specifications for the QAM256
Digital Video Modulator and Upconverter.
7.1 Specifications Without Cable Upconverter
Data Rate: 1 - 55 Mbps
Modulation: 4, 16, 32, 64, 128, and 256 QAM (7 Msps Maximum)
Roll Off: 12, 15, and 18% Selectable
FEC: 204/188 Reed-Solomon with I = 1 - 204 programmable
Forney Convolutional Interleaver meets J.83 Annex A,
Annex B
7.1.1 IF Interface
Frequency: 43 – 44 MHz, or optional 35 – 37 MHz, 1 Hz Steps
Level: 0 to –25 dBm
Spurious: -50 dBc
Impedance: 75Ω
7.1.2 Baseband Interface
Format: MPEG-2 Transport
Physical: Parallel, ASI, Advanced ASI, DVB Parallel, M2P Parallel
7.1.3 Remote Interface
RS-485, Terminal RS232, Ethernet, 10 Base-T SNMP
(Optional)
7.1.4 Physical
Chassis Size: 1.75” H x 19” W x 17.75” D
(4.445cm H x 48.26cm W x 48.085cm D)
Power: 100 – 240 VAC, 50/60 Hz or –48 VDC (Optional)
Environmental: 0 - 50°C, < 95% Humidity @ 25°C
7.2 Specifications With Cable Upconverter
Data Rate: 1 - 55 Mbps
Modulation: 4, 16, 32, 64, 128, and 256 QAM (7 Msps Maximum)
Roll Off: 12, 15, and 18% Selectable
FEC: 204/188 Reed-Solomon with I = 1 - 204 programmable
Forney Convolutional Interleaver meets J.83 Annex A,
Annex B
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