Promax CABLE RANGER, Руководство пользователя

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Chapter 4: TOOLS 51 April 2018
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Options Menu
There are some options at the bottom of the screen:
„
CLR IQ: It clears constellation.
„
Back to previous screen.
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Description
The equipment can measure video carrier signal level, Video/Audio and C/N ratio
and HUM in analog mode. This is all shown alongside the screen together with
the spectrum analyzer graphic. The HUM is buzz at low frequency modulation
that affects video analogue carriers, producing a distinctive hum. The HUM
value up to 2% is considered acceptable. Above this value is not acceptable and
it should take appropriate countermeasures.
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Operation
HUM is available for analogue signals in these functions: SPECTRUM
ANALYZER and SCAN.
1 Select channel or frequency and tune it.
2 Press on "DEMOD" option.
4.3 Analog Video Carrier / HUM