Measuring The Power Of Digital Channels (Channel Power) - Promax PROLINK-3 Premium Manual De Instrucciones

USER'S MANUAL. PROLINK-3/3C
Figure 42.- Carrier to Noise measurement in Spectrum mode (digital channel).
To define the frequency to measure the noise, select the Reference noise
function in the Spectrum functions menu and press the rotary selector. Next, again in
the Spectrum mode, turn the rotary selector to place the marker on the frequency where
you want to measure noise level or press key
will be erased and using the keyboard introduce the new value. Finally accede to the
functions menu again and execute the Carrier function so that you can tune new carrier
frequencies by turning the rotary selector.
When C/N measuring mode is selected, on the lower part of the image appears
the tuned frequency/channel (Carr.), the noise frequency (Noise), the carrier Level (if
analogue mode is selected) or the channel Power (if digital mode is selected) and the
carrier to noise ratio (C/N).
4.10.2.3

Measuring the Power of Digital Channels (Channel Power)

In the Spectrum Analyser mode the PROLINK-3/3C
channel power using an Integration method between channel limits which are defined
by the user. To show the interest of this method, imagine a spectral distribution like the
one shown in the following figure (channel bandwidth is 8 MHz defined by the markers).
If channel power is measured in TV operation mode different readouts will be obtained
depending on the tuned frequency (measurement filter bandwidth is 230 kHz), if tuning
is shifted from 759 MHz to 762 MHz reading will increase in several dB.
06/2005
Premium
[31], current reference noise value
Premium measures digital
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