USER’S MANUAL. PRODIG-5
11/2006 Page 51
English
FRE
:
CH:
MPEG-2
650.00 MHz
-3 kHz
43
C/N:
» POWER:
MER:
CBER:
VBER:
dB
dBµV
dB
>21.3
55.8
19.5
5.0E-2
5.3E-4
10 30 50 70 90 110 130
Figure 25.- Digital channel power measurement.
In addition to the power of the digital channel (55.8 dBµV in previous figure) this
also shows the tuning frequency or channel, depending on the tuning mode selected,
and the offset frequency to calculate the digital channel power.
For the power measurement of a digital channel to be correct it is essential to
have previously defined the channel bandwidth using the Channel BW option, in the
Measurements Configuration menu that appears when pressing
[17] key.
5.14.5 Digital TV: Measuring BER
The PRODIG-5 (
EXPLORER) offers three ways to measure the error rate (BER) of
digital signals depending on the type of used modulation.
To select the BER measurement mode:
1) Select digital signals Measurements Configuration pressing
[17] key.
2) Select by means of Signal option from CONFIGURATION menu: DVB-C for the
measurement of QAM modulated signals, DVB-T for the measurement of
COFDM modulated signals or DVB-S for the measurement of QPSK modulated
signals. Available frequency ranges are:
DVB-C
(QAM) signals 45 MHz to 865 MHz
DVB-T
(COFDM) signals 45 MHz to 865 MHz
DVB-S
(QPSK) signals 950 MHz to 2150 MHz
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