Important Remark; Selecting The Measurements - Promax TV Explorer HD Manual De Usuario

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
FM Deviation
Terrestrial band - Digital channels (DVB-C and DVB-T/H):
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. (according to TV standard)
Measure the frequency peak deviation for any modulated
analogue carrier in FM.
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. TV EXPLORER HD / HD

IMPORTANT REMARK

[13], tune the channel at its central
[12], measurement selection.
LE
05/2011