参数资料
型号: L64781
厂商: LSI CORP
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封装: PLASTIC, QFP-100
文件页数: 76/164页
文件大小: 2003K
代理商: L64781
Typical Performance
1-7
Figure 1.3
Performance with Additive Write Gaussian Noise
(AWGN)
Figure 1.4 illustrates the target protection ratio of PAL-I into DVB-T. The
point indicated by “carriers coincident about here” shows the point where
the vision carrier of the PAL-I signal lines up directly with one of the
carriers on the ODFM frequency raster.
Figure 1.4
DVB-T Carrier to Co-Channel PAL-I Interference Ratio
for Failure
Figure 1.5 illustrates the maximum level of echo acceptable to the
demodulator. The graph shows that in the selected mode, the
demodulator works without failure inside the guard interval and without
failure signicantly outside it.
25
20
15
10
5
0
1/2 2/3 3/4
5/6 7/8
1/2 2/3 3/4 5/6 7/8
1/2
2/3 3/4 5/6 7/8
QPSK
16-QAM
64-QAM
CIN
(dB)
Measured QEF
Simulated QEF from specication
2
0
2
4
6
8
10
12
2500
1500
500
1500
2500
Less Robust
More Robust
Normal Frequency Offset (Hz)
64 QAM Rate 2/3
16 QAM Rate 3/4
QPSK Rate 1/2
CIN
(dB)
Carriers coincident
about here
l64781.book Page 7 Friday, January 19, 2001 1:28 PM
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