CLOSED CAPTION SERIES
LINK ELECTRONICS, INC.
CHARACTER GENERATOR CAPTION DECODER
MODEL PDR-870
MADE IN THE USA
FEATURES
‹ Caption Decoder
‹ One RU Chassis
‹ S/N Ratio >60dB
‹ Dif Gain <0.1%
‹ Dif Phase <0.1°
‹ RS-232
‹ XDS Channel
‹ Drop Shadow
‹ Data Recovery Decoder
‹ Character Generator Decoder
‹ TV Ratings Monitor
‹ NTSC or PAL(Stable Source)
‹ Composite or S-VHS Input
‹ High Impedenced Loop
‹ Extended Character Set
‹ Box Character Keying
‹ Internal or External Video
‹ Internal Video Generator
‹ Background Adjust
‹ 4 Caption Channels
‹ 4 Text Channels
The PDR-870 is a high performance Closed Caption
Decoder for the NTSC and PAL systems. It is
capable of processing and displaying all standard
closed caption format transmissions--including the
EIA-608 Extended Character Set--in the manner of
a typical closed caption decoder. A stable input video
source is required.
The PDR-870 can also perform a unique data
conversion to reveal the “non-printing” characters
that are part of the closed caption control codes.
Designed with the professional user in mind, the
PDR-870 processes baseband video in either
composite or S-Video formats. A rear-panel push-
button switch is used to select the input/output
format. The selected video mode is displayed at the
front panel by a pair of green LEDs.
Nine standard data channels are supported by the
PDR-870: Captions channels 1 thru 4 (CC1-CC4),
Text channels 1 thru 4 (T1-T4) and Extended Data
Services (XDS). The various decoding channels are
selectable by four front-panel toggle switches.
Additional front-panel toggle switches provide
NTSC/PALvideostandardselection, drop-shadowor
box character keying, and internal/external video.
The internal video function allows the PDR-870 to
generate its own video as a medium for producing
open captions.
The composite video format uses a single high-
impedance, looping input with two outputs. The S-
Video format can use standard 4-pin mini-DIN
connectors or BNCs for its input/output. The video
performance is outstanding with differential phase
and gain errors limited to less than 0.1° and 0.1%
respectively.
The un-weighted signal-to-noise ratio approaches
70dB. AC-Coupled, complementarydifferentialinput
amplifiersassurehighcommonmodenoiserejection
while discrete phase-linear keyers provide clean
insertion of the decoded characters into the video
image.
In addition, the PDR-870 can accept an RS-232 data
stream and directly produce open captions, serving
as a “character generator decoder.” Along with it’s
powerful decoder functions, the PDR-870 can serve
as an accurate “V-Chip” ratings monitor. All rating
information described by EIA-744 may be displayed
on-screen by the PDR-870. Both TV Parental
Guidelines and Motion Picture Association of
America (MPAA) ratings are supported.
Packaged in Link’s 1RU 800-Series chassis, the
PDR-870 is both rugged and reliable. All Link
Electronics products are covered by one of the best
warranties in the industry, 10-years including parts
and labor. High performance, flexibility, and
economy are equally represented in the PDR-870
CG, Data Recovery Decoder .
The PDR-870 can recover incoming Line 21 data
and send it to a computer terminal via the RS-232
port. This data may be recovered with or without the
embedded closed caption control codes.
LINK
ELECTRONICS, INC. ‹ 2137 Rust Avenue ‹ Cape Girardeau, MO 63703-7668
Phone 573 334 4433 FAX 573 334 9255
‹
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