Promax HD RANGER+ Manual page 131

A1.2
ANALOGUE signals
Terrestrial band
A1.2.1
Analogue TV
In the measurement of analogue signals in terrestrial band, measurements
available are:
LEVEL
►
Indication of the carrier level of the tuned video.
C/N
►
Ratio between the modulated signal power and noise power for the same
bandwidth (depending on TV standard).The modulation error ratio (MER),
used in digital systems is analogue to the Signal-Noise (S/N) ratio in
analogue systems. T Carrier level is measured by a quasi-peak detector
(100 kHz BW).The noise level is measured with an average detector and
corrected to refer it to the bandwidth equivalent to channel noise
(according to its definition for the TV selected standard).
Video/Audio
►
Ratio between levels of the video carrier to audio carrier.
Analogue FM
In the analogue FM measurement mode signal, the display acts as an
analogue indicator of signal representing the signal at the input. The
equipment also demodulates the FM carrier (radio) and can be listened
through the speaker.
April 2013
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