Promax PROLINK-4/4C Premium Manual De Instrucciones página 183

USER'S MANUAL. PROLINK-4/4C
TPS in lock
The TPS (Transmission Parameter Signalling) are decoded. The TPS are carriers
(17 in the 2k system and 68 in the 8k system) modulated in DBPSK, containing
information related to the transmission, modulation and codification: Modulation
type (QPSK, 16-QAM, 64-QAM), Hierarchy, Guard Interval, Viterbi Code Rate,
Transmission mode (2k or 8k) and Number of the received frame.
MPEG-2
Correct detection of a MPEG-2 signal.
In case of detecting a DVB signal, message MPEG-2 DVB-T will appear and the
DVB Channels Identifier function will be automatically activated. (See section '4.9.2
DVB Channels Identifier: DCI function').
The PROLINK-4/4C Premium, also offers the possiblity of measuring the
modulation error ratio (MER), CSI or BER before FEC simultaneously with the BER
after Viterbi for COFDM signals. Once the COFDM 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 COFDM setup function from second submenu and
finally press it again to activate it. The monitor will show a screen displaying three
possibilities: CSI, MER and BER before FEC, then turn the rotary selector [4] to select
the desired option and finally press it to confirm.
Figure 18.- MER measuring screen for COFDM-modulated signals.
06/2005
Premium
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