L64780 LSI Logic Corporation, L64780 Datasheet - Page 50

• Manufacturer Part Number: L64780
• Description: Dvb-t Cofdm Demodulator Technical Manual 2/00
• Manufacturer: LSI Logic Corporation

3.3.1 DDFS Output
Figure 3.23 DDFS Output Mapping
3.3.2 FFT Output
Figure 3.24 FFT Output Mapping
3.3.3 AFC Output
Figure 3.25 AFC Output Mappings
3-14
18 MHz CLK START DV
36 MHz CLK START DV
36 MHz CLK START DV
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26
26
25
25
25
24 23 22 21
24 23 22 21
24 23
The DDFS output lets you probe signals after carrier frequency
compensation and prior to FFT processing. The signals are I and Q data
(in two’s complement format), a start pulse that delimits the COFDM
symbols (START), a data valid (DV) signal that accompanies valid data,
and an 18 MHz clock. These signals are mapped on the MUXOUTBUS.
See
The FFT output lets you probe data prior to Common Phase Error (CPE)
correction and Channel Equalization (CE). The signals are I and Q data
(in two’s complement format), a start pulse that delimits the COFDM
symbols (START), a data valid (DV) signal that accompanies valid data,
and a 36 MHz clock. These signals are mapped on the MUXOUTBUS.
See
The AFC output lets you probe data after Common Phase Error (CPE)
correction and prior to Channel Equalization (CE). The signals are I and
Q data (in two’s complement format), a start pulse that delimits the
COFDM symbols (START), a data valid (DV) signal that accompanies
valid data, and a 36 MHz clock. These signals are mapped on the
MUXOUTBUS. See
Interfaces
0
0
Figure
Figure
3.23.
3.24.
Q[11:0]
Q[9:0]
Q[9:0]
Figure
3.25.
12 11 10 9
12 11 10 9
12 11
0
0
I[11:0]
I[9:0]
I[9:0]
0
0
0