Measuring Wrong Packets Of Ts Mpeg-2 (W.P.) - Promax PROLINK-4/4C Premium Manual De Instrucciones

USER'S MANUAL. PROLINK-4/4C
DVB-S channels tuning may require an adjusting process. It is recommended to
follow next procedure:
1.- From the spectrum analyser mode, tune the channel at its central
frequency.
2.- Switch to TV mode, BER measuring 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 and if signal level is too low, check that the 40dB
attenuator is not activated (Attenuator 0 dB).
The PROLINK-4/4C Premium, also offers the possiblity of measuring the
modulation error ratio (MER) and BER before FEC for QPSK signals. Once the QPSK
signal parameters have been defined, you can access to the digital mode function menu
by pressing the rotary selector [4], then turn it to select QPSK setup and finally press it
again to activate it. The monitor will show a screen displaying two measurement
possibilities: MER and BER before FEC to represent it by means of a graphical bar, then
turn the rotary selector [4] to select the desired option and finally press it to confirm.
Figure 21.- MER measuring screen for QPSK-modulated signals.

4.9.1.5.4 Measuring Wrong Packets of TS MPEG-2 (W.P.)

When the BER measurement indicates acceptable reception quality (always to
the left of the QEF level), and the identification information confirms that you have found
the required channel, you can analyse the Wrong Packets received from the MPEG-2 /
DVB Transport Stream.
06/2005
Premium
IMPORTANT REMARK
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