Promax US TV EXPLORER II, User Manual

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USER’S MANUAL. US TV EXPLORER II
01/2008 Page 69
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MODULATION:
DVB-T/H (64 QAM)
F:
CH:
CARRIER:
TYPE: data
66
MHz 794.00
MPEG-2 TS DVB-T CLEAR ZOOM:x2
DECAY: 16
0
DESPLAZAR: PULSAR ENCODER
Figure 49 .- Zoom x2 constellation diagram.
5.16 Spectrum Analyzer
The Spectrum Analyzer mode allows the user to discover the signals present in
the frequency band in quickly and easily and to make measurements at the same time.
To select it press [13] key. The monitor will show a picture like the one described in
the next figure.
70
60
50
40
30
FREQ:
POWER:
43 CH: SPAN: 32 MHz
650.00 MHz
65.6 dBµV
Figure 50.- Spectrum analyzer mode.
The horizontal lines define the signal level, the broken lines being separated a
distance equals to 10 dB. The level of the top line (70 dBµV in previous figure), named
Reference Level , can be altered using the vertical cursors [6] key over a range from
60 dBµV to 130 dBµV by steps (from 70 dBµV to 130 dBµV in satellite band). The vertical
measurement range changes to 5 dB/div by holding pressed the lower arrow cursor key
[6] and changes to 10 dB/div by holding pressed the upper arrow cursor key
[6].