TDA8046 Datasheet, PDF (33/48 Pages) NXP Semiconductors – Multi-mode QAM demodulator

Philips Semiconductors
Multi-mode QAM demodulator
Product specification
TDA8046
PARAMETER
Equalizer
BIT
PRESET
EDFE
EFFE
EFC
[fine AGC (equalizer
freeze centre tap)]
EAR
FFEL
VALUE
0
1
0
1
0
1
0
1
DESCRIPTION
normal operation
coefficient to zero (main tap to 1)
normal operation
freeze coefficients of DFE part
normal operation
freeze coefficients of FFE part
normal operation
freeze centre tap, no fine AGC
0
automatic reset switched OFF
1
automatic reset switched ON
0
5 taps in FFE part
1
3 taps in FFE part
Table 11 I²C write parameters; 2-bit values
PARAMETER
Window size (lock detector)
Output format
DAC carrier recovery
(maximum current)
DAC clock recovery
(maximum current)
DAC AGC
(maximum current)
WS1
0
0
1
1
OUTB
0
0
1
1
CARB
0
0
1
1
CLKB
0
0
1
1
AGCB
0
0
1
1
BITS
WS0
0
1
0
1
OUTA
0
1
0
1
CARA
0
1
0
1
CLKA
0
1
0
1
AGCA
0
1
0
1
DESCRIPTION
256 symbols
512 symbols
1024 symbols
2048 symbols
scheme 1
scheme 2
scheme 3
scheme 4
50 µA
100 µA
150 µA
200 µA
50 µA
100 µA
150 µA
200 µA
50 µA
100 µA
150 µA
200 µA
1996 Nov 19
33