Vision signal characteristics

Vision signal characteristics

Characteristics of the vision transmitter

21. Vestigial sideband transmission shall be used. The response at the television channel limits shall be reduced by at least 20 dB, relative to the response at 1.5 MHz above the vision carrier.

Group delay/frequency response

22. The vision transmitter shall incorporate group delay correction so that the overall group delay/frequency response of the transmitter and standard vestigial sideband demodulator shall be flat to 5 MHz. The group delay characteristic shall be in accordance with figure A3.7.