Digital Tv: Measuring The Power Of Digital Channels - Promax TV EXPLORER HD Manual De Usuario

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 Measurements Configuration menu that appears when
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.

5.13.6 Digital TV: Measuring the Power of Digital Channels

The TV EXPLORER HD
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:
Figure 23.- Digital channel power measurement.
In addition to the power of the digital channel (77.4 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.
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USER'S MANUAL. TV EXPLORER HD
IMPORTANT REMARK
measures digital channel power in the measurement filter
11/2009