SEFRAM 7859, Руководство пользователя

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12.5 Terrestrial band
The appliance automatically makes level measurements on the Video carrier wave.
The following table sums up the measurement types and the frequencies of the audio carrier waves for each
standard:
Standard Video carrier Measure Sound carrier
Mono stereo NICAM
BG negative, AM peak FM FM DQPSK
5.5 MHz 5.74 MHz 5.85 MHz
DK negative, AM peak FM FM DQPSK
6.5 MHz 6.258 MHz 5.85 MHz
I positive, AM peak FM DQPSK
6.0 MHz 6.552 MHz
L positive, AM peak AM DQPSK
6.5 MHz 5.85 MHz
MN negative, AM peak FM FM
4.5 MHz 4.72 MHz
DVB-C digital power
DVB-T/H digital power
DVB-T2 digital power
DAB/DAB+ digital power
FM FM average
Carrier not modulated average
The appliance displays the level of the Video carrier wave and the C/N ratio.
12.6 Thresholds
Predefined thresholds are used to assess if the measurement is pertinent.
Standard Min Max
Terrestrial analog TV 57 74
DVB-C/C2 57 74
DVB-T/T2 35 70
DAB-DAB+ 35 70
FM, Carrier 50 66
Satellite analog TV 47 77
DVB-S, DSS 47 77
DVB-S2 47 77