Analog Signal Demodulator - Promax RANGER mini User Manual

3.7

Analog Signal Demodulator

Description
►
The equipment can measure video carrier signal level, Video/Audio and C/N
ratio, HUM and intermodulation products from an analogue signal. 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
countermeasures.
Operation
►
This function is available for analogue signals in DOWNSTREAM and SCAN.
1 Select analogue channel or frequency and tune it.
2 Press on "DEMOD" option.
3 To set measurement parameters for intermodulation products (CTB/CSO)
access the settings menu at the upper right corner.
September 2018
value is not acceptable and it should
26
take appropriate
Chapter 3: MEASUREMENT