MC92314 Datasheet, PDF (85/100 Pages) Motorola, Inc – DVB-T Single Chip Demodulator Application Note

Freescale Semiconductor, Inc.
Usage and Performance of Motorola’s Single-chip DVB-T Device
In this case reprogramming the AQ_THRES to a slightly higher forces the synchroniser in the
aquisition mode again and requires a larger number of syncbytes to be found before changing
to the tracking mode.
Of course this reprogramming of the .._THRESH values must be repeated after a hardware reset
of the MC92314.
5.5 MC92314 Performance
The overall BER performance matches the requirements as defined in the DVB-T specification
(see reference [1-1]), Annex A with a degradation margin of 3 dB.
5.5.1 Performance in a typical Consumer Application
n _{5.5.1.1 Typical Lock Performance}
tio ^{The following figures show typical lock performance measured with the ALPS tuner mentioned}
a ^{before. Again the setup used was 64-QAM, coderate 2/}3 ^{and guard interval 1/}32 ^{in RF channel 68}
(center frequency 850 MHz). In the following traces the upper channel indicates the AGC status
Preliminary ^{Inform of the tuner (AGC1, Pin#2) and the lower trace shows the RERRU pin of the FEC block.}
Single Chip DVB-T Demodulator - Rev. 1.3 (11/30/98)
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