Digital Tv: Measuring The Power Of Digital Channels - Promax TV EXPLORER HD ISDB-T Manual

USER'S MANUAL. TV EXPLORER
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

The TV EXPLORER
measurement filter bandwidth and estimates total channel power assuming that spectral
density is uniform throughout channel bandwidth.
On selecting the CHANNEL POWER measurement mode, the screen displays the
following information:
In addition to the power of the digital channel (67.0 dBµV in previous figure) this
also shows the tuning frequency or channel, depending on the tuning mode selected,
and the offset frequency to calculate the digital channel power and the deviation
frequency of the central tuning calculated by the demodulator, measurement that
indicates the adjustment in the channel tuning.
For the power measurement of a digital channel to be correct it is essential to have
previously defined the channel bandwidth using the Channel BW option, in the
Measurements Configuration menu that appears when pressing
11/2010
HD ISDB-T/T
B
HD ISDB-T/T
B
Figure 29.- Digital channel power measurement.
IMPORTANT REMARK
measures digital channel power in the
[17] key.
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