PS20313 Datasheet, PDF (1/26 Pages) List of Unclassifed Manufacturers – DVB-S Satellite Demodulator

PS20313
DVB-S Satellite Demodulator
Data Sheet
Features
• Conforms to EBU specification for DVB-S and
DirecTV specification for DSS
• On-chip digital filtering supports 1 - 45 MSps
symbol rates
• On-chip 60 or 90 MHz dual-ADC
• High speed scanning mode for blind symbol
rate/code rate acquisition
• Automatic spectral inversion resolution
• High level software interface for minimum
development time
• Up to ±22.5 MHz LNB frequency tracking
• DiSEqC™ v2.2: receive/transmit for full control of
LNB, dish and other components
• Compact 64-pin LQFP package (7 x 7 mm)
Applications
• DVB 1 - 45 MSps compliant satellite receivers
• DSS 20 MSps compliant satellite receivers
• SMATV (Single Master Antenna TV) trans-
modulators
• Satellite PC applications
Data Sheet 292103 issue 1
Ordering Information
PS20313 C1L1A5
PS20313 C1L1AT
64Pin LQFP Trays
64Pin LQFP* Tape and Reel
*Pb Free Matte Tin
0°C to +70°C
Description
The PS20313 is a QPSK/BPSK 1 - 45 MSps
demodulator and channel decoder for digital satellite
television transmissions to the European Broadcast
Union ETS 300 421 specification. It receives analogue
I and Q signals from the tuner, digitises and digitally
demodulates this signal, implements the complete
DVB/DSS FEC (Forward Error Correction) and de-
scrambling function. The output is in the form of
MPEG2 or DSS transport stream data packets. The
PS20313 also provides automatic gain control to the
RF front-end device.
The PS20313 has a serial 2-wire bus interface to the
control microprocessor. Minimal software is required
to control the PS20313 because of the built in
automatic search and decode control functions.
I I/P
Dual ADC
Q I/P
De-rotator
Decimation
Filtering
Timing recovery
Matched filter
Phase recovery
DVB
DSS
FEC
MPEG/
DSS
Packets
Analog
AGC
Control
Clock Generation
Figure 1 - Functional Block Diagram
Acquisition
Control
Bus I/O
2-Wire Bus
Interface
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