一直在高清卫视接收设备上俳佪，从最早心动的AK47，到DM800 HD都未能让我下得了决心，因为经过对以上二个接收机的潜水研究发现AK47与800都不完美，具体缺点如下：
AK47的缺点
1、CCCAM共享帐号名称不能修改，不能换服务商。
2、不能修改节目台名。
3、录像文件自动分段，硬盘只支持FAT32格式。
4、系统软件未开源，对烧友来说可玩性不高。
5、由于刚出来，还存在或多或少的BUG。
HD800的缺点：
1、没有HDMI接口
2、门限高
3、没有盲扫
4、要换高频头才能支持DVB-S和DVB-C
综合以上因素，个人偏向较成熟的卫视接收卡，于昨天入手了prof 8000
这是PROF公司生产的PCI-E最顶级的DVBS2卡。
采用易尔达高频头，号称全球门限最低，反应速度最灵敏的高频头。可见厂家采用此高频头真的很舍得下本。
官网我们能看到的图是V1.1版本的。但我拿到的是最新改版的V2.0版本的新卡。经测试门限超低，可喂世界上最好的DVB卡。
做工一流。用料很足。做工精美。支持HTPC半高机箱。遥控手感也相当好。
驱动方面当然也很厉害。官网发布的驱动可以支持PTG1.7引擎。这是种很新的技术。可以用它进行盲扫。调星看信号都很灵。
WIN7 32位（已经支持PTG）与64位已经获得支持：
此卡能接收艺华高清4个，其他高清尚未测试
1.BBC高清（记录片居多） 2.韩国高清（放连续剧多） 3.高清足球（实况比赛） 4.高清探索（刺激惊险）
经过试用发现支持的软件成熟功能强大（编解码器可随软件更新），驱动兼容性好，插件众多，完美支持EPG，支持中文台标，支持同时多路即时定时录像，缺点是软硬件安装有一定的难度，换台速度不快，其他的还有待发现。具体技术参数：
High sensitivity
Features reception and presentation of DVB data services (high-speed multicast and internet access)
Support of AltDVB, DVBDream, DVBviewer, ProgDVB, MediaPortal, FastSatFinder
DiSEqC 1.0, 1.1, 1.2, USALS
Remote control
Drivers for Windows XP/Vista/Win7
PTG Engine 1.7 Blind Scan Interface
BDA-driver (Broadcast Driver Architecture) support many 3rd party applications
PTG Engine
Designed in Germany
Video Features
HDTV support (MPEG2 and MPEG4/H.264)
AC3 5.1 software decoder
Support of DXVA (DirectX Video Acceleration) for H.264
Plug and play installation
Recording and playback via TV/radio
Teletext
Time shift support
Electronic Program Guide (EPG)
Additional FeaturesProf DVB-S2 8000 can operate with Manna, Skynet, SkyGrabber, FastSatFinder software and different plugins for DVBDream, ProgDVB, DVBviewer.
Included in the Box
DVB-card – 1 piece.
CD with drivers and software – 1 piece.
Remote control – 1 piece.
External IR-receiver – 1 piece.
Quick-start guide – 1 piece.
System Requirements
OS: Microsoft Windows 32bit 2000/XP/Vista/Win7
CPU: 2,0 GHz
512MB RAM
Sound card
PCI-E-slot
Suitable digital satellite dish
System Requirements for HDTV in h.264Video card ATI or NVIDIA:
ATI with ATI AVIVO HD: Radeon HD 5000 Series, Radeon HD 4000 Series, Radeon HD 3000 Series, Radeon HD 2600 Series, Radeon HD 2400 Series, Radeon HD 4200/AMD 785G Chipset, Radeon HD 3200/AMD 780G Chipset, Radeon HD 3300 IGP/AMD 790GX Chipset.
NVIDIA with Purevideo HD: GeForce 200 Series, GeForce 9 Series, GeForce 86xx, GeForce 85xx, GeForce 84xx.
Technical Specification8PSK/QPSK direct conversion tuner IC: STB6100
Powered by RF Magic
Direct conversion
Input range 950 to 2150 MHz
Supports 1 to 45 Msymbol/s
Fully integrated LO and PLL
Differential I/Q outputs
Buffered XO output to clock other devices
Low external component count
Low power consumption
2-wire I2C serial interface
8PSK/QPSK support
Simple interface to ST’s satellite demodulator devices
Low phase noise, excellent linearity and high
LO harmonics rejection
Small QFN-32 pin package
Multi-standard advanced demodulator: STV0903
Multi standard demodulation
DVBS2 QPSK, 8PSK
Up to 45Msps DVBS, DVBS2 QPSK and 8PSK
Technology
80 nm CMOS process
Multi supply: 1.0-V core, 2.5-V analog, 3.3-V digital interfaces
Power saving features
LQFP128-EP 14 x 14 package, RoHS
PCI Express Video and Broadcast Audio Decoder: Conexant CX23885
PCI Express 1.0a/1.1 compliant bus
Worldwide audio and video decoding
Automatic video and broadcast audio standard detection and configuration
Flexible video input mux supporting composite, S-Video, and component inputs with integrated anti-alias filtering
Integrated sigma-delta stereo audio ADCs with 4:2 mux
Audio sample rate converters on all inputs and outputs
Two MPEG transport stream ports—parallel and serial
Two I2C master ports
Macrovision 1.0 detection compliant
Programmable VBI data slicer for data services such as closed caption, WSS, and program guides
Infrared transmitter and receiver logic
Auxiliary/Audio Phase Locked Loop (PLL) clock for general use
Support for MPEG-2 encoding when used with the CX23417
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