Promax PROLINK-4C Manual De Instrucciones página 169

USER'S MANUAL. PROLINK-4C
Finally it is shown a status line with information about the detected signal. The
possible messages that can appear and its meaning are shown in the following list. The
messages are exposed from less to more fulfilment of the MPEG-2 standard:
No signal received
Any signal has been detected.
Signal received
A signal is detected but it can not be decoded.
Carrier recovered
A digital carrier has been detected but it can not be decoded.
Viterbi synchronized
A digital carrier has been detected and the Viterbi algorithm is synchronized, but
too many frames arrive with non correctable errors. It is not possible to quantify
the BER.
MPEG-2
Correct detection of a MPEG-2 signal.
In case of detecting a DVB signal, message MPEG-2 DVB-S will appear and
the DVB Channels Identifier function will be automatically activated. (See section
'4.9.2 DVB Channels Identifier: DCI function').
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 30 dB
attenuator is not activated (Attenuator 0 dB).
02/2003
IMPORTANT REMARK
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