Zoom, Scroll And Erasing Functions - Promax TV EXPLORER HD ISDB-T Manual

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 ISDB-T/T
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.,.
5.15.1.1

Zoom, scroll and erasing functions

The TV EXPLORER
graphic representation over one single quadrant. Select the SCROLL option to move the
focus over the whole viewing area using arrow cursors
reset the graph screen or SHARP option to increase the image clearness.
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USER'S MANUAL. TV EXPLORER
HD ISDB-T/T also includes, a ZOOM function to enlarge
B
Figure 45.- Zoom x2 constellation diagram.
[1] and the arrow cursors
[6] key, CLEAR option to
HD ISDB-T/T
B
[6] key, is
(64 QAM).
B
NOTE
11/2010