Typical Values For Measurements - Alcad 918 Serie Manuel D'utilisation

dBm is a logarithmic ratio between a measured power Pd and a reference power Pr.
The reference power is Pr = 1 mW into 75 ohms.
N = 10 log (Pd/Pr) with Pd = Ud2 / 75
U = 1 μV
d
U = 1 mV
d
U = 1 V
d

27.3 Typical values for measurements

Values given are indicatives, minimum and maximum for good signal quality
Measurements
Terrestrial
Analogue TV
FM
DVB-T/H
DVB-T2
DVB-C
Satellite
Analogue TV
DVB-S, DSS
DVB-S2
103
N = 0 dBμV
N = 60 dBμV
N = 120 dBμV
Level, power (dBμV)
C/N (dB)
mini maxi
57 74
50 66
35 70
35 70
57 74
47 77
47 77
47 77
N = - 60 dBmV N = -108.75 dBm
N = 0 dBmV N = -48.75 dBm
N = 60 dBmV N = 11.25 dBm
BER MER (dB)
> 45 -
> 38 -
E
> 26 VBER < 2 -4
E
> 22 FER < 2 -7
E
> 31 BER < 2 -4
> 15 -
E
> 11 VBER < 2 -4
E
> 8 PER < 1 -7
modulation
- -
- -
> 26 8K, 64QAM,
1/32, 2/3
> 22 32K,
256QAM,
1/8, 2/3
> 31 64QAM
- -
> 11 QPSK, 3/4
> 8 8PSK, 2/3