Cable TV Amplifier (150-1960A) Operation Faxback Doc. # 7149 After you make all the connections, turn on your video receivers (TV/VCR/cable box). Adjust GAIN as needed, from +10 dB to +20 dB. If the channel shows horizontal lines or double images, turn GAIN toward - . If the channel shows snow, turn GAIN toward + . (CJD/all-7/8/94)