Itu-T J.83/B (Qam-Annex B) Signal - Promax US TV EXPLORER II Manual De Uso

Every modulation type is represented differently. A QPSK signal is represented
on the screen by a total of four different zones and a 8PSK is represented by a total of
eight different zones and so on.
The constellation shows in different colors the density of hits and includes
zooming, scrolling and clearing functions for a better graph representation on screen.
5.15.1

ITU-T J.83/B (QAM-Annex B) signal

Go to the UTILITIES menu by pressing the
CONSTELLATION option.
For example the modulation type: ITU-T J.83/B is showed on screen. Next, the
frequency and channel number corresponding to the channel plan selected as well as
the satellite downlink frequency. Finally, the satellite name and orbital position are
stated.
MPEG-2 ITU-T J.83/B
Figure 46.- Constellation Diagram. MPEG-2 TS ITU-T J.83/B.
The US TV EXPLORER
representation over one single quadrant. Select the SCROLL option to move the focus
over the whole viewing area using arrow cursors
the graph screen or SHARP option to increase the image clearness over a range from 0
(minimum visual persistence) to 16 (maximum visual persistence).
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USER'S MANUAL. US TV EXPLORER
MODULATION:
F:
CH:
ZOOM:x1
II also includes, a ZOOM function to enlarge graphic
[22] key, and then select the
794.00 MHz
61
DECAY: 16
CLEAR
[6] key, CLEAR option to reset
II
11/2013