Vizio VX37L HDTV10A, Service Manual, Page: 47 / 147

CONFIDENTIAL
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DO NOT COPY Page
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File No. SG-0209
3. FEATURES
1. Compliant with ATSC digital television standard
2. Supports SCTE DVS-031 and ITU J.83 Annex B digital CATV standard
3. Accepts direct IF (44 MHz or 43.75MHz) and low IF (5.38MHz)
4. Differential IF input with programmable input signal level: 0.5Vpp to 2Vpp
5. NTSC interference rejection capability
6. Compensate echo up to -35 to +60
us range for terrestrial HDTV reception
7. Pass all Brazil fading channel ensembles
8. Meet all ATSC/A74 requirements.
9. On-chip programmable gain amplifier
10. 25MHz crystal for clock generation
11. Excellent adjacent and co-channel rejection capability, only single SAW is required
12. Full-digital timing recovery, no VCXO is required
13. Full-digital frequency offset recovery with wide acquisition range ±1MHz for ATSC
and ±250kHz for CATV reception
14. Dual digital AGC controls for IF and RF respectively
15. MPEG-2 transport stream output in parallel or serial format
16. On-chip error rate estimators for TS packets, TCM decoder, and equalizer
17. EIA/CEA-909 antenna interface, both mode A and mode B are supported
18. Controlled by I2C interface
19. Supports sleep mode to save power consumption
20. Core power supply: 1.8V, peripheral power supply: 3.3V
21. 100-TQFP with lead free package
WM8776
The WM8776 is a high performance, stereo audio codec with five channel input selector.
The WM8776 is ideal for surround sound processing applications for home hi-fi, DVD-RW
and other audiovisual equipment. Etch ADC channel has programmable gain control with
automatic level control. Digital audio output word lengths from 16-32 bits and sampling
rates from 32kHZ to 96KHZ are supported. The DAC has an input mixer allowing an
external analogue signal to be mixed with the DAC signal. There are also Headphone and
line outputs, with control for the headphone.
The WM8776 supports fully independent sample rates for the ADC and DAC. The audio
data interface supports I2S, left justified, right justified and DSP formats.