L64724 LSI Logic Corporation, L64724 Datasheet - Page 135
L64724
Manufacturer Part Number
L64724
Description
Satellite Receiver
Manufacturer
LSI Logic Corporation
Datasheet
1.L64724.pdf
(294 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L64724-75
Manufacturer:
LSI
Quantity:
20 000
Company:
Part Number:
L64724D-90/65085A2-001
Manufacturer:
LSILOGIC
Quantity:
17 007
- Current page: 135 of 294
- Download datasheet (4Mb)
5.3 DC Offset Compensation and Coupling to ADC Output
The internal ADC produces six-bit samples that digitize the analog data
streams into 64 discrete values, as shown in
Figure 5.2
The L64724 provides for an internal suppression of DC offsets on the
I and Q channels.
The suppression feature is particularly useful when using an integrated
front end that does not provide DC offset compensation pins and that
introduces small offsets. DC offset compensation is controlled with the
DC_Offset_On_Off[1:0] bits (see Group 4, APR 23). The DC offset
compensation can be accomplished with or without noise feedback,
whichever best optimizes BER. Noise feedback essentially shapes the
quantization error spectrum.
Back end DC offset compensation (after the matched filter) is also
provided and can be used if necessary. To enable this function, set the
INT_DC bit to 1 (Group 4, APR 25).
DC Offset Compensation and Coupling to ADC Output
Input Quantization
2
3
1
ADC Output
3
1
2
ADC
Input
Figure
5.2.
5-3
Related parts for L64724
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Mpeg-2 Audio/video Decoder
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Satellite Decoder Technical Manual 5/97
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Tuner/receiver Chipset
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Tuner And Satellite Receiver Chipset Data Sheet 2/01
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Smatv Qam Encoder
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
DVB Qam Modulator
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Dvb-t Cofdm Demodulator Technical Manual 2/00
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
16-Bit HCMOS Multiplier / Accumulators
Manufacturer:
LSI Logic Corporation
Part Number:
Description:
Transport with Embedded CPU and Control
Manufacturer:
LSI Logic Corporation
Part Number:
Description:
32-Bit HCMOS IEEE Floating-Point Processor
Manufacturer:
LSI Logic Corporation
Part Number:
Description:
Controllers, Transport Controller with Embedded MIPS CPU (TR4101)
Manufacturer:
LSI Logic Corporation
Datasheet:
Part Number:
Description:
Variable-Length Video Shift Registers
Manufacturer:
LSI Logic Corporation