FIELD METERS MCT 080 / 081 / 082 / 085 USER MANUAL
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10.4 C/N
The device automatically measures C / N (carrier to noise ratio).
The calculation of C / N depends on the chosen standard:
analogue standard: C / N (dB) = carrier - noise - 10 x log (bandwidth / filter)
digital standard: C / N (dB) = carrier - noise
Standard
‘carrier’
detection
‘noise’
detection
bandwidth
filter
Analog TV
BG, DK, I, L
peak
mean
5 MHz
25KHz
Analog TV
MN
peak
mean
4MHz
25KHz
Digital TV
Terrestrial
mean
mean
5, 6, 7 ou 8MHz
25KHz
DAB/DAB+
mean
mean
1.7MHz
25KHz
Digital TV
satellite
mean
mean
bitrate x (1+rolloff)
125KHz
Measurement cursor
« carrier »
Measurement cursor
« noise »