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Figure 11.- Digital channel power measurement.
In addition to the power of the digital channel (45.8 dBµV in previous figure) this also
shows the tuning frequency or channel, depending on the tuning mode selected, and the
parameters regarding bandwidth: Channel BW and measuring filter bandwidth (Measure BW).
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 function, in the
TV mode functions menu (see section '4.9.4.11 Channel Bandwidth').
4.9.1.5
BER measurement mode selection
The PROLINK-4 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 the TV operating mode. If present operating mode is the spectrum
analyser mode press key
2)
Select the terrestrial band for the measurement of QAM or COFDM modulated
signals or the satellite band for the measurement of QPSK modulated signals.
Available frequency ranges are:
QAM signals
COFDM signals
QPSK signals
3)
Select the DIGITAL operating mode by means of the key
4)
Select the BER measurement mode: to do this press key
the rotary selector [4] to select the BER measuring mode, next, to activate it
press the rotary selector [4] or key
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[21].
47 MHz to 862 MHz
40 MHz to 870 MHz
950 MHz to 2150 MHz
[22].
USER'S MANUAL. PROLINK-4
[20].
[22] and turn
02/2003
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