SI2181-B60-GM屬于RF/IF射頻/中頻RFID的RF解調(diào)器。由美國思佳訊公司制造生產(chǎn)的SI2181-B60-GMRF 解調(diào)器RF 解調(diào)器是設(shè)計用于從調(diào)制波中提取信號的器件，調(diào)制波則是通過使用頻率、幅度、相位、放大器或位移器而改變的波。

描述 Description

The Si2181 integrates digital demodulators for the Japanese and

South American terrestrial ISDB-T standard and for all first and

second generation DVB standards (DVB-T/C/S/S2 and S2X) in a

single advanced CMOS die. Leveraging Skyworks' proven digital

demodulation architecture, the Si2181 achieves excellent

reception performance for each media while significantly

minimizing front-end design complexity, cost, and power

dissipation. Connecting the Si2181 to a hybrid TV tuner or digital

only tuner, such as Skyworks' Si217x/5x/4x devices, results in a

high-performance and cost optimized TV or STB front-end

solution.

Leveraging significant field experience in DVB terrestrial

demodulation (DVB-T), Skyworks’ internally-developed ISDB-T

demodulator can accept standard or low-IF inputs (differential) and

complies with the Brazilian SBTVD-T terrestrial specifications

(ABNT NBR 16.601 and 15.604). Main features include fast

channel scan, very short lock times, state of the art CCI

performance, partial reception, and auxiliary channels decoding.

DVB-T, DVB-C, and DVB-S2/S demodulators are next-generation

enhanced versions of proven and broadly-used Skyworks’

Si2169/68/67/66/64/62/60 devices.

The satellite reception allows demodulating widespread DVB-S,

DIRECTV? (DSS), DVB-S2, DIRECTV? (AMC) legacy

standards, and new Part II of DVB-S2 (S2X) satellite broadcast

standard. A zero-IF interface (differential) allows for a seamless

connection to market proven satellite silicon tuners. Si2181

embeds DiSEqCTM 2.0 LNB interface for satellite dish control and

an equalizer to compensate for echoes in long cable feeds from

the antenna to the satellite tuner input.

The cable reception allows demodulating widely deployed DVB-C

legacy standard (ITU-T J.83 Annex A/C) and the Americas' cable

standard (ITU-T J.83 Annex B).

The Si2181 offers an on-chip blind scan algorithm for DVBS/

S2/S2X and DVB-C standards, as well as a blind lock function.

The Si2181 programmable transport stream output interface

provides a flexible range of output modes and is fully compatible

with all MPEG decoders or conditional access modules to support

any customer application.

特性 Features

- Pin-to-pin compatible with all Si216x/8x single demods family

- API compatible with all single and dual demods families

- ISDB-T (ABNT NBR 16.601 and 15.604)

- 6, 7, and 8 MHz bandwidth

- Partial reception supported

- AC1 and AC2 decoding

- DVB-S2 (ETSI EN 302 307-1 V1.4.1)

- QPSK/8PSK demodulator

- DVB-S2X (ETSI EN302 307-2 V1.1.1)

- QPSK/8PSK, 8/16/32APSKdemodulator

- Roll-off factors from 0.05 to 0.35

- DVB-T (ETSI EN 300 744)

- OFDM demodulator and enhanced FEC decoder

- NorDig Unified 2.5 and D-Book 8 compliant

- DVB-C (ETSI EN 300 429) and ITU-T J.83 Annex A/B/C

- QAM demodulator and FEC decoder

- 1 to 7.2 MSymbol/s

- DVB-S and DSS supported

- QPSK demodulator and enhanced FEC decoder

- 1 to 45 MSymbol/s for all satellite standards (<40 MSps in

32APSK)

- LDPC and BCH FEC decoding for S2 standard

- I2C serial bus interfaces (master and host)

- Firmware control (embedded ROM/NVM)

- Upgradeable with patch download via I2C or fast SPI

- Flexible TS output interface (serial, parallel, and slave)

- DiSEqCTM 2.0 interface and UnicableTM support for satellite

- Fast lock times for all media

- Low power consumption

- Two power supplies: 1.2 and 3.3 V

- 7x7 mm, QFN-48 pin package, Pb-free/RoHS compliant