Link electronics, Media Converter, models:

Caption Encoder/Decoder SD SDI/Analog PTC-892	Specifications Instruction Manual
Closed Caption Series ENC-896	Specifications
DigiFlex 1163	Specification Sheet
DigiFlex 1165	Specification Sheet
DigiFlex 1166	Specification Sheet
DigiFlex 1660	Specification Sheet
HDC-925	Specification Sheet
High Definition Closed Caption Encoder HDE-3000	Specifications
NTSC/PAL to SDI Converter DigiFlex 1160	Specification Sheet
PDR-870	Specification Sheet
SD SDI Video Closed Caption Encoder/Decoder PDP-886	Specifications
Two Field Closed Caption Decoder IEC-786	Specification Sheet
Two Field Closed Caption Decoder IEC-788	Specification Sheet
VBI Caption/Data Processor Encoder/Decoder PDR-885	Specifications