Dvb-T/H (Cofdm) Signal - Promax TV EXPLORER HD+ Manual De Instrucciones

USER'S MANUAL. TV EXPLORER HD+

5.15.1 DVB-T/H (COFDM) signal

Activate the UTILITIES menu by pressing the
CONSTELLATION option. Now, on screen will be recorded the hits due to symbols
received during the digital signal transmission.
Figure 45.- Constellation Diagram. DVB-T/H (64 QAM) signal.
By means of the rotary selector
possible to change the frequency, channel or COFDM carrier on tune by the instrument.
The DECAY option sets the visual persistence for symbol impacts on the screen in
a range from 0 (minimum) to 16 (maximum).
First appears the information about the type of modulation DVB-T/H (64 QAM).
Next it is indicated the frequency, the channel and the carrier tuned. It is also indicated
the carrier type (data or pilot). Finally, it shows the status line (similar to the
measurement screen).
The transmission quality is visualised in a qualitative way using a colour range for
the symbol density concentrated in a certain area. This colour coding goes from
black (no symbols), to red (maximum density), and runs from blue to yellow in
ascending order.
A greater dispersion of the symbols indicates greater level of noise or worse signal
quality.
If concentration of symbols or noise appears is indicative of good carrier/noise ratio
or absence of problems as phase noise, etc.
11/2013
[22] key, and select the
[1] and the arrow cursors [6] key, is
NOTE
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