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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.,.
5.15.1.1
Zoom, scroll and erasing functions
The TV EXPLORER
representation over one single quadrant. Select the SCROLL option to move the focus
over the whole viewing area using arrow cursors
graph screen or SHARP option to increase the image clearness.
5.15.2 DVB-T2 (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.
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HD +
also includes, a ZOOM function to enlarge graphic
Figure 46.- Zoom x2 constellation diagram.
USER'S MANUAL. TV EXPLORER HD +
[6] key, CLEAR option to reset the
[22] key, and select the
NOTE
12/2011
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