GPRL026 - BALBOX GPI Inserter / Extractor, Teletext Signalling 최대 16개의 GPI 신호를 입력받아 이를 SDI 신호에 실어서 비디오 신호와 같이 송수신 하는 장비 독립 데이터 라인인 Teletext 으로 전송 Local/GPI 컨트롤 입력 : 1 x SDI, 16 x GPI 출력 : 2 x SDI   GPRL026 - BALBOX GPI Inserter / Extractor, Teletext Signalling The GPRL026 allows up to 16 GPI signals to be transported as a Teletext ’independent data line’ in the SDI video signal . Two SDI outputs are provided. The unit may be set by the installer to insert or extract data. In the insert mode, the inputs are simply 16 contact closures. In the extract mode, voltage-free relay contacts outputs are provided (both NO and NC). Two units are required to provide a GPI link. A bypass relay is incorporated to route the SDI input to the ‘main’ SDI output to ensure signal continuity in the event of power failure, or under user control. By cascading two or more units it is possible to achieve redundancy, or embed more than 16 GPI signals in one SDI signal. The unit has an integral mains power supply. SDI INPUT CHARACTERISTICS Input signal: 270Mb/s serial digital video to SMPTE RP259M Line standard: 625/50 or 525/60 automatically detected Cable equalization: up to 250m of Belden 8281 coaxial cable or similar Input impedance: 75 ohm terminating Input return loss: >15dB Input connector: BNC socket GPI CHARACTERISTICS No of circuits: 16. Inputs (in insert mode): Contact closure to ground (must be held closed for at least 20ms) Outputs (in extract mode): Voltage-free NO/NC relay contacts (48V /100mA max). GPI Data connector: 50way sub-miniature D-type socket, with screw-locks. SDI OUTPUT CHARACTERISTICS No of outputs: 2 Output signal 270Mb/s serial digital video to SMPTE RP259M Bypass: Power fail/user select between SDI input and main SDI output Output impedance: 75 ohm Output return loss: >15dB Output connectors: BNC socket x 2 CONTROLS DIP switches: Manual Bypass Rotary switch: VBI Insertion line selection (7 to 22) INDICATORS LED 1: Bi-colour, status LED 2: Power INSTALLATION DATA Package: Standard BALBOX housing, with three 75ohm BNC signal connectors and one 50w D-type socket. Size: 184 x 103 x 42.4mm. Weight: 950g. Mains supply: 90 – 250Vac Consumption: <15VA