User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD 8VSB ATSC Modulator
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 2 36
Transport Stream Inputs
DVB-ASI Inputs
The DVB-ASI inputs accept an MPEG-2 transport stream according to DVB
recommendations. Both 188 and 204 byte transport packets are supported.
Automatic switching provides near seamless switching to a secondary transport stream if
the primary transport steam source fails.
SMPTE 310M Inputs
The SMPTE 310M input accept a MPEG-2 transport stream.
Note: The SMPTE 310M inputs are an optional feature of the ATSC modulator.
Modulator Operating Modes
The modulator operating modes are Normal and CW. In Normal mode, the modulator
generates a complete ATSC (8-VSB) waveform. In CW mode, the modulator generates
a narrow-band frequency tone.
ATSC M/H Mode
The modulator can be configured to process incoming M/H packets created by an M/H
pre-processors.
Network Modes
The modulator can be configured for MFN or SFN network operation.
RF Output
The RF output covers a frequency range of 470 MHz to 860 MHz in 1 Hz steps.
Windowing (Window Enabled)
The windowing function is a raised cosine window that reduces the modulation sidebands
of the COFDM spectrum. It may be enabled or disabled.
Internal Frequency Reference
The modulator is equipped with an internal reference frequency that has a stability of ±
0.05ppm, suitable for MFN Mode. Where higher accuracies are required, an external 10
MHz reference signal must be applied to the 10 MHz external reference input.