Link electronic Portable Generator PDR 870 User Manual

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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