User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD 8VSB ATSC Modulator
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 2 81
Note 1: The values are for 8 MHz bandwidth. For smaller bandwidths, they are scaled
accordingly. Levels are measured in 10 kHz bandwidth, where 0dB is the level of the
carriers at the edge of the spectrum. Harmonics and spurious are not included.
Manual Digital Pre-correction
Non-Linear Pre-Correction
Curve Formats S 21 and VO/VI
Amplitude Scale Linear and Logarithmic
Correction Points Max. 256, user-defined position
Spectral Regrowth Reduction Max. 12 dB, subject to available headroom
Phase Correction -6 to +30 degrees, subject to available headroom
Linear Pre-Correction
Correction Points 61
Point Spacing 1/60 of nominal spectrum BW
Amplitude Correction ±10 dB
Amplitude Resolution 0.01 dB
Group Delay Correction ±2000 ns
Group Delay Resolution 1 ns
Peak Power Clip Level +17dB to +7dB
(peak power relative to average RMS level)
Table 32: Manual Digital Pre-correction