Promax PROLINK-4C, Manual

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USER’S MANUAL. PROLINK-4C
Page 38 02/2003
On selecting the CHANNEL POWER measurement mode, the screen displays
the following information:
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-4C 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 [21].
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 47 MHz to 862 MHz
COFDM signals 40 MHz to 870 MHz
QPSK signals 950 MHz to 2150 MHz
3) Select the DIGITAL operating mode by means of the key [20].