Important Remark; Selecting The Measurements - Promax PRODIG-3 Manual Del Usaurio

DVB channels tuning may require an adjusting process. It is recommended to follow
next procedure:
1. From the spectrum analyser mode
frequency.
2. Switch to Measurements mode
3. If in the lower line of the screen does not appear MPEG-2 message (and
consequently BER is unacceptable), by turning the rotary selector deviate the
tuning frequency until MPEG-2 message appears. Finally tune channel again to
minimize the frequency deviation which optimizes the BER and therefore
minimize the BER.
If it is not possible to detect any MPEG-2 channel, make sure that digital signal
parameters are correctly defined.
5.14

Selecting the Measurements

The types of measurements available depend on the operating band (terrestrial or
satellite) and the type of signals (analogue or digital).
Terrestrial band - Analogue channels:
Level
Video / Audio
C/N
Terrestrial band - Digital channels ( DVB-T ):
Channel power
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Level measurement of the currently tuned carrier.
Video carrier to audio carrier ratio.
Ratio between the modulated signal power and the equivalent
noise power for a same bandwidth.
Channel power is measured assuming that power spectral
density is uniform throughout channel bandwidth.
To measure it correctly it is indispensable to define the
Channel BW.
USER'S MANUAL. PRODIG-3

IMPORTANT REMARK

[13], tune the channel at its central
[12], measurement selection.
03/2008