Measurements Configuration; Dvb-C (Qam) Digital Channel Configuration - Promax TV EXPLORER HD+ Manual De Instrucciones

When the instrument completes the exploration, a new channel plan is generated
based on the active channel plan. This new channel plan contains only the channels that
have been identified and the rest are removed. The equipment offers the possibility of
saving in memory the channel plan generated to use later. If the new channel plan is not
saved it will remain active until the instrument is powered off or some other plan is
loaded.
:
NOTE In the case that is desired to explore or identify DVB-C signals will be
necessary to select previously DVB-C standard as digital signal identifier
by means of
5.13

Measurements configuration

With the aim of taking the measurements of all types of signals some times could
be necessary that user enters parameters relative to particular characteristics of these
signals, whether an automatic detection has not been possible, or these parameters
differ from the standard corresponding ones.

5.13.1 DVB-C (QAM) Digital Channel Configuration

Press the Measurements Configuration
CONFIGURATION menu and turn the rotary selector
Select the signal DVB-C, which uses QAM modulation. Parameters related to QAM
modulation that the user can set are described below:
1) Channel BW (channel bandwidth)
Enables the channel bandwidth to be selected up to 9.2 MHz. The selection of this
parameter is essential for the correct operation of the tuner, as it affects the
frequency separation of the carriers.
The user can modify the bandwidth and then the symbol rate will change
according to the bandwidth, but once the demodulator locks a signal, the
bandwidth will change according to the symbol rate detected.
2) Spectral inversion
If necessary, activate the Spectral inversion (On). If the spectral inversion is not
correctly selected, reception will not be correct.
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[22] PREFERENCES menu.
USER'S MANUAL. TV EXPLORER HD+
[17] key to access to the
[1] until the SIGNAL option.
11/2013