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When measuring channels in the satellite band or digital channels, to measure the
C/N ratio correctly, the bandwidth of the channel must be defined previously, using the
Channel BW
option on the
pressing the
[17] key.
In order to measure digital channel C/N ratio it is indispensable to tune channel at
its central frequency.
In the case of the presence of adjacent digital channels, these could mask the noise
level measurement.
5.14.6 Digital TV: Measuring the Power of Digital Channels
TV EXPLORER
The
extrapolated
The
method makes an approximation to a specific power value according
to some known power values, so that it measures channel power in the bandwidth of the
measuring filter and estimates the total channel power assuming that the spectrum
density is uniform over the entire bandwidth of the channel. The
RMS value
gives the true
Page 54
USER'S MANUAL.
Figure 27
.- NOISE cursor.
Measurements Configuration
HD
/
HD
allows choosing between two measuring methods.
LE
for any signal.
TV EXPLORER HD / HD
C/N
(MANUAL).
menu that appears when
IMPORTANT REMARK
integrated
LE
method
10/2012
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