Scientific Atlanta 3250HDTM 用户手册

 
 
 

 

3

Analog Component HDTV Outputs 

Provides YPbPr outputs for quick and easy connection to most HDTV sets 

Dual Audio Outputs with Composite 
Video Output 

Allows simultaneous connection to the audio inputs on the HDTV as well as 
the audio and video inputs on a VCR 

DAVIC Reverse Path Data 
Transmitter 

Allows IP-based, real-time two-way communication between the 3250HD 
and the headend 

 

Enables cable service provider to offer two-way services such as Internet 
browsing, video-on-demand (VOD), subscription VOD (SVOD), e-mail, and 
real-time chat 

MPEG-2 MP@HL Digital Video 

Allows decompression and presentation of audio and video 

Decompression 

Delivers video resolutions up to 1920 x 1080 

Dolby

®

 Digital Audio and MPEG-1 

Audio Support 

Supports leading digital audio standards 

PowerKEY

®

 Conditional Access 

System 

Provides digital security using an RSA encryption algorithm that 
mathematically matches pairs of keys 

PowerTV

®

 Operating System with 

HTML Client Engine 

Offers stable operating system and open Application Programming 
Interfaces (APIs) to support native applications and third-party middleware 
applications 

 

Allows upgrades using a network download 

Enhanced Graphics Engine 

Displays up to 65,000 colors simultaneously 

 

Enables high-resolution 640 x 480 IPG graphics while simultaneously 
scaling MPEG-2 video 

Automatic Scaling of MPEG-2 Video 
for IPG Window 

 

Powerful 32-bit RISC Processors 

Features a 166 MHz (166 MIPs) processor to perform tasks and applications 
quickly 

Over 40 MB Memory 

8 MB Flash, or 16 MB available as an option 

16 MB Applications DRAM, or 32 MB available as an option 

16 MB Media DRAM 

4 KB NVM 

64 and 256 ITU J.83 Annex B QAM 
Support 

Supports open standards for QAM delivery and demodulation 

Analog and Digital Service Tuner 

Allows both analog and MPEG-2 digital channels to be tuned and displayed 

DAVIC Compliant Integrated Cable 
Modem 

Provides a high-speed data forward path to the 3250HD 

Both Internal Security 
Microprocessor and Smart Card Slot 

Provide hardware-assisted conditional access options with capability to 
upgrade the security, if ever needed 

Macrovision

®

 Copy Protection 

Support 

Activation allows cable operators to add another layer of copy protection 
software, called Macrovision, that restricts subscribers from copying 
protected transmissions such as VOD and SVOD to the analog composite 
outputs 

Scales MPEG-2 video for optimal viewing in 
the IPG window regardless of whether the 
subscriber is watching an HD or SD channel 
on either a widescreen or standard 4:3 TV