Chapter 15 - Spectrum analyzer 111
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This allows you to quickly identify which DVB-C channels have 256 QAM and which have 64 QAM,
for example.
Figure 15-4 TILT measurement
For every cursor position, the upper blue display area shows the channel, the level measured
during the last search, the channel type (analog/digital) and, for digital channels, the modulation.
The values assigned to the cursor are displayed to the left or right in the 2nd line according to the
cursor position.
The level differential between the two cursor positions is also displayed in the 1
st
line to the right “2-
1” stands for the difference between the right (2
nd
) and left (1
st
) cursor.
No level reduction is taken into account in the level displays. This means that these are the
absolute levels. The level differential which appears in the brackets does, however, include the
level reduction. This means that these displays can be used to set the reference line between the
cursors exactly horizontal.
