MC92314 Datasheet, PDF (39/100 Pages) Motorola, Inc – DVB-T Single Chip Demodulator Application Note

Freescale Semiconductor, Inc.
Device Description
Synchroniser is in the Tracking Mode (the value “n” now corresponds to Tr_Sync_Thresh and on
the x-axis is Tr_Ref_Thresh).
The Acquisition Time increases with higher values of Aq_Ref_Thresh and decreases with higher
MPEG-2 Transport Stream input data rates. Each of the 12.75 synchronisation trials needs the
duration of Aq_Ref_Thresh (default: 8) times 204 bytes, times 8 bits/byte, and divided by the
input data bit rate. At 50 Mbit/s, the time interval until the correct position of the Sync Byte is
found averages 3.3 ms at a BER of 5 * 10^-2.
n _0.1
atio _0.001
Inform ^1E-05
y _n=7
r _1E-07
limina ^1E-09
Pre^1E-11
1E-13
1E-15
0
10
20
Number of Frames
n=1
30
Figure 3-13. Loss of Synchronisation Probability for BER=5E-2
Single Chip DVB-T Demodulator - Rev. 1.3 (11/30/98)
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
3-21