S5H1420
DBS信道解码器的DVB -S / DSS
目录
页面
1 。 INTRODUCTION...……………………………………………………………………………………3
1.1概述………………………………………………………………...………………….………….3
1.2 Features…………………………………………………………………………………………………..3
1.3 Applications………………………………………………………………………………………………3
1.4订购Information………………………………………………………………………………………3
1.5功能博克图.......................................................................................... 0.4
2。 INFORMATION...……………………………………………………………………………………4
2.1引脚assignment……………………………………………………………………………………………4
2.2引脚description……………………………………………………………………………………………5
3.功能描述... ....................................................................................... 6
3.1信号处理................................................................................................ 6 ...
3.1.1我& Q输入................................................................................................ 6
3.1.2 PRE - AGC…………………………………………………………………………………………6
3.1.3根升余弦和速率转换滤镜......................................................... 6
3.1.3偏移取消... .......................................................................................... 0.6
3.1.4 POST - AGC ........…………………………………………………………………………………6
3.2定时recovery.………………………………………………………………………………………..6
3.2.1时序control……………………………………………………………………………………...6
3.2.2循环equation……………………………………………………………………………………. 7
3.2.3定时锁定指示灯... ................................................ ... .................................... 0.7
3.3载波恢复和消旋环........................................................................... 0.7
3.3.1循环式................................................................................................ 7
3.3.2载波锁定检测.......................................................................................... 0.8
3.3.3消旋frequency………………………………………………………………………………..8
3.3.4自动频率检测器.............................................................................. 0.8
3.3.5假lock……………………………………………………………………………………………8
3.4前向纠错correction………………………………………………………………………………8
3.4.1 FEC modes………………………………………………………………………………………..8
3.4.2软decision………………………………………………………………………………………8
3.4.3维特比解码器和同步..................................................................... 8
3.4.4 Synchronization…………………………………………………………………………………...9
3.4.5错误monitoring…………………………………………………………………………………..9
3.4.6卷积交织器................................................................................. 9
3.4.7里德 - 所罗门解码器和解扰............................................................... 9
码率5/6 ............... .. ...................................................... 10 3.4.8频谱逆
3.4.9 MPEG interface……………………………………………………………………………………10
3.4.9.1并行输出接口.............................................................................. 10
3.4.9.2串行输出接口................................................................................. 10
3.4.9.3 MPEG时钟控制................................................................................. 12
3.5前端界面....................................................................................... 13
3.5.1 I
2
interface……………………………………………………………………………………….13
3.5.2写操作（正常模式） ............................................ ............................... 13
3.5.3读操作（正常模式） ............................................ ............................... 13
3.5.4标识寄存器....................................................................................... ..13
3.5.5采样frequency………………………………………………………………………………13
3.5.6时钟generation………………………………………………………………………………….13
3.5.7 I
2
C总线repeater…………………………………………………………………………………..14
3.5.8的DiSEqC interface…………………………………………………………………………………14
4.注册LIST……………………………………………………………………………………………..16
5.电气特性................................................................................. 26
5.1绝对最大额定值....................................................................................... 0.26
5.2推荐工作条件........................................................................... 26
5.3直流电characteristics…………………………………………………………………………..26
5.4 A / D converter……………………………………………………………………………………………26
5.5定时characteristics………………………………………………………………………………….27
5.6 I
2
C总线characteristics…………………………………………………………………………………28
6.应用EXAMPLES………………………………………………………………………………..29
6.1应用实例与DVB -S调谐器..................................................................... 29
7.包装DIMENSION…………………………………………………………………………………….30
8.数据表更新History…………………………………………………………………………...…….31
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