User manual Link electronic VBI Caption/Data Processor Encoder/Decoder PDR-885

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CLOSED CAPTION SERIES  
LINK ELECTRONICS, INC.  
VBI CAPTION/DATA PROCESSOR  
ENCODER/DECODER  
Model PDR-885  
MADE IN THE USA  
FEATURES  
‹
‹
‹
‹
‹
Encode, Data Recovery  
Field 1 or Field 2  
Caption & Text  
Decoder Output  
Optional Modem  
‹ Y,R-Y,B-Y Input & Output  
‹ Two Composite Outputs  
‹ S/VHS Input & Output  
‹ RS-232C Controlled, RS-422 Option  
‹ V-Chip Compatible  
The PDR-885 is a Closed Caption Encoder with an  
integral Decoder for inserting caption and text data  
on Line 21 of the NTSC signal. However, this  
important function is only the beginning of the  
PDR-885 capabilities.  
If composite video is used, a high performance  
relay provides power-off by-pass of the program  
video. For remote captioning applications, a  
second serial port is available as a modem input.  
Both serial ports may be configured for RS-232 or  
RS-422 I/O, with optional plug-in PCB. An internal  
jumper allows baud rate selections of 1200 to 9600  
bps. A modem and computer may be connected  
simultaneously to process local and remote  
caption data, only one active at a time.  
Caption and Text data may be inserted in either  
field of the Vertical Blanking Interval. In addition,  
data on the incoming video signal may be  
recovered from either field of the VBI. This  
incoming data may be displayed as Open  
Captions, using the built-in Closed Caption  
Decoder, and captured by a computer utilizing the  
PDR-885's serial data port. Each of these  
importantfunctions,Encoding,Decoding,andData  
Recovery may be done simultaneously.  
Front panel LED's show the unit status and the  
presence of data on the incoming video. A pair of  
front panel push-buttons allow the user to run an  
encoded test message or to place the unit in by-  
pass mode.  
The Closed Caption Decoder's functions may be  
controlled from the front panel while the Encoder  
and Data Recovery functions are controlled via the  
serial data port. The video data path approaches  
perfection, with differential phase and gain errors  
less than 0.1° and 0.1% respectively. Video  
bandwidth is >26MHz while Signal to Noise  
exceeds 60dB. Inputs and outputs are provided for  
composite NTSC video as well as Component (R-  
Y/B-Y/Y) and S-Video.  
The PDR-885 is ready for V-Chip technology. This  
technology will allow parents to block violent or  
otherwise offensive television programming from  
their TV sets. LINK Electronics is incorporating this  
technology in the firmware of the PDR-885. The  
PDR-885 handles the automatic repetition of the  
"V-Chip" data and can interleave it with existing  
Line 21 Closed Caption data. An optional plug-in  
modem is available that operates at 1200 or 2400  
baud.  
LINKELECTRONICS, INC. ‹ 2137 Rust Avenue ‹ Cape Girardeau, MO 63703-7668  
Phone 573 334 4433  
‹
FAX 573 334 9255  

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