參數(shù)資料
型號： MC92315
廠商： Motorola, Inc.
英文描述： DVB-T(Digital Video Broadcast - Terrestrial) Demodulator(DVB-T數(shù)字視頻通信解調(diào)器)
中文描述： 的DVB - T（數(shù)字視頻廣播-地面）解調(diào)器（的DVB - T數(shù)字視頻通信解調(diào)器）
文件頁數(shù)： 1/1頁
文件大?。?/td> 225K
代理商： MC92315
Product Brief
MC92314/MC92315
Integrated OFDM Demodulator for
DVB-T Implementation
Feature Set –
Usable for 8/7/6 MHz channels by
adjusting the clock rate
2 K and 8 K transmission modes
supported by the MC92315
(MC92314 is 2 K only)
Digital I/Q separation on chip
Digital AFC on chip
Supports QPSK, 16-QAM and 64-QAM
(non-hierchical for the MC92314)
Supports all guard interval lengths
(1/32, 1/16, 1/8, 1/4)
Automatic locking to any DVB-T guard
interval
Accepts 8-bit TTL-compatible twos complement
and offset-binary data input
Provides control signals for AGC and ADC clock
frequency control
DVB Reed-Solomon and Viterbi decoders
Channel estimation and correction using the pilot
carriers
3.3 V operation for the MC92314, 1.8 V for the
MC92315
Each part is pin compatible in a 160 QFP
The MC92314 is a DVB-T (Digital Video
Broadcast-Terrestrial) compliant demodulator for a
2 K transmission mode according to the ETSI
specification for digital terrestrial broadcasting. The
MC92315 device is a pin-for-pin version of the
MC92314 which supports the 8 K transmission
mode as well. This two-part option allows for
flexibility in cost for system designs without
spending resources on engineering.
Both devices are derived from three 1st generation
DTV parts: FFT, OFDM demodulator and FEC. The
OFDM block combines an effective I/Q
demodulator with active, real time control blocks
for AFC and AGC on the input. The FFT block
performs either a 2 K or 8 K (MC92315) length
Fourier Transform and has a selectable output
accuracy of 10 or 12-bit. The FEC combines a DVB
Reed-Solomon decoder, a Viterbi decoder and error
monitoring and bit-setting while allowing an
output MPEG-2 Transport Stream rate of up
to 37 Mbit/s.
MC92314/MC92315 Block Diagram
MOTOROLA, INC. 1999
The MC92314/MC92315 has been designed with
system effectiveness in mind. Multi-path signals
(which cause ghosting), signal strength conditions
(which cause distortion to the picture) and many
other artifacts need to be considered in a terrestrial
design. The MC92314/MC92315 combines a high-
performance, active front end along with a precise
FFT which allows the DVB-T system to operate
normally under the worst conditions.
Operational interface is provided via a I2C bus
protocol. Operation is simplified by having the
device preconfigured such that only minimal set up
programmimg is required.
Motorola was the first to market the DVB-T
demodulation technology and has provided its
customers with a migration to more cost effective
solutions. Today, Motorola provides a promising
road-map, with state-of-the-art manufacturing
capabilities, making them an attractive partner
for the future.
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