Scientific Atlanta 3250HDTM User Manual

Subscriber Networks

Explorer 3250HD™
High-Definition Interactive Set-Top

Description

Scientific-Atlanta’s Explorer
Interactive Set-Top merges high-definition video capability
and broadband digital video services to deliver a broad
range of entertainment, information, and communications
services.

The 3250HD decodes all 18 ATSC digital video formats,
including the 6 high-definition (HD) digital formats for
HDTV. All standard-definition digital formats and all analog video services
are decoded as well. This comprehensive level of decoding capability
in one set-top box enables cable service providers to quickly scale
HDTV video services for both analog and digital consumers.

The 3250HD can output video to the HDTV display in four resolutions:
480i, 480p, 720p, or 1080i. These resolutions, or scan rates, allow consumers
to select the scan rate best suited for their HDTV set. Consumers can
stretch and zoom the video picture to maximize its viewable area on the HDTV display.

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3250HD™ High-Definition

For added connectivity, the 3250HD offers optional loop-through that provides
a set of component HDTV inputs, a composite video input, and both analog audio
and optical digital audio inputs. A consumer with limited inputs on their HDTV
can use the loop-through connectivity feature on the 3250HD to connect additional
electronic devices.

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Features

 166 MIPS Processor
 Integrated DAVIC Cable Modem
 8 MB Flash Memory, 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
 Analog Component HDTV Outputs
 Composite Audio/Video Outputs
 S-Video Output
 Digital Audio Outputs (RCA and Optical)
 Front Panel USB Port
 Ability to Process All Analog and Digital Services
 IR Port for VCR Commander™ Service

Explorer 3250HD High-Definition Interactive Set-Top

Description, continued

To meet the demands of existing and future network configurations, the
3250HD offers power, capacity, and compatibility. The integrated internal
DAVIC cable modem allows the 3250HD to communicate instantly with the
cable headend to promote a broad range of interactive entertainment,
information, and communications services. Over 40 MB of application and
program memory, along with the 166 MHz RISC microprocessor, manage
multiple program tasks and applications with speed and power. The USB port
offers fast interconnectivity to consumer peripherals.

Optional Features

 16 MB Flash Memory
 32 MB Applications DRAM
 DVI 1.0 Digital HDTV Output
 IEEE 1394 Digital Outputs
 Loop-Through Connections for Component HDTV, Composite Video, and

Analog and Digital Audio

 IR Blaster Cable
 IR Extender Cable
 RF Bypass
 Universal AllTouch

or AT2300

3250HD rear panel showing optional loop-through connections

3250HD rear panel showing optional IEEE 1394 digital outputs

®

Remote Control: AT8400, AT8450, *AT8550, AT2400,

The 3250HD makes it easy to maximize
the screen image for non-HD channels.
For a widescreen HDTV set, simply
click “stretch” and then “zoom” from
the Quick Settings menu on the
3250HD set-top.

Taping an HD broadcast to an analog VCR is seamless with the 3250HD.
The set-top simultaneously displays the HD image and downconverts it to SD
(standard definition) through the NTSC outputs.

The optional VCR Commander Service integrates the interactive TV program
guide with the VCR so that consumers simply point-and-click to setup and
record programs.

To maximize the screen image for a
standard 4:3 HDTV set, simply change
the scan rate to 480i using the Quick
Settings menu on the 3250HD set-top.

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