Promax TV EXPLORER HD ISDB-T/T B Manual De Instrucciones página 178

The BER measurement is provided in scientific notation (i.e. 1.0 E-7 means
-7
1.0x10 , that is to say 1.0 average value of wrong bits of each 10.000.000) and through
a graphic bar (as its length is smaller the signal quality will be better). The analogue
representation is done on a logarithmic scale (not linear), that is to say, the bar divisions
correspond to the exponent of the measurement.
The letter into brackets next to the measure indicates the layer where the
measurement is done. The layer can be (A), (B) or (C).
With the aim to have a reference about the signal quality, it is considered that a
system has a good quality when it decodes less than one non-correctable error for every
transmission hour. This border is known as QEF (Quasi-Error-Free) and it corresponds
approximately to a BER after Viterbi of 2.0E-4 BER (2.0x10
of each 10000). This value is marked on the measurement bar of the BER and therefore,
BER for acceptable signals must be at the left side of this mark.
Finally it is shown a status line with information about the detected signal. The
possible messages that can appear and its meaning are showing the following list. The
messages are exposed from less to more fulfilment of the MPEG-2 standard:
No signal received
No signal has been detected.
Signal received
Signal has been detected.
Timing recovered
You can only recover the symbol time.
Viterbi Synchronised
The error correcting system is processing data correctly.
MPEG-2 TS ISDB-T/T
ISDB-T/T signal detected. At the ouput modulator is delibered a TS MPEG-2.
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USER'S MANUAL TV EXPLORER
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HD ISDB-T/T
-4
, that is to say 2 wrong bits
B
10/2012