User manual TANDBERG TT-1222_2

[. . . ] ST. RE. TT1222. 2 Issue 2 ENGLISH (UK) REFERENCE GUIDE TT1222 4:2:0 Professional Receiver Software Version 2. 0. 0 (and later) TT1222 4:2:0 Professional Receiver Preliminary Pages ENGLISH (UK) READ THIS FIRST! If you do not understand the contents of this manual DO NOT OPERATE THIS EQUIPMENT. Also, translation into any EC official language of this manual can be made available, at your cost. ITALIANO LEGGERE QUESTO AVVISO PER PRIMO! Se non si capisce il contenuto del presente manuale NON UTILIZZARE L?APPARECCHIATURA. anche disponibile la versione italiana di questo manuale, ma il costo a carico dell?utente. SVENSKA LS DETTA FRST!Om Ni inte frstr informationen i denna handbok ARBETA D INTE MED DENNA UTRUSTNING. [. . . ] Forward Error Correction: A method of catching errors in a transmission. The data is processed through an algorithm that adds extra bits and sends these with the transmitted data. The extra bits are then used at the receiving end to check the accuracy of the transmission and correct any errors. Fast Fourier Transformation: A fast algorithm for performing a discrete Fourier transform. First In, First Out: A data structure or hardware buffer from which items are taken out in the same order they were put in. Also known as a shelf from the analogy with pushing items onto one end of a shelf so that they fall off the other. A FIFO is useful for buffering a stream of data between a sender and receiver that are not synchronised - i. e. The area of the Earth?s surface covered by a satellite?s downlink transmission. Also (generally) the area from which the satellite can receive uplink transmissions. File Transfer Protocol: A protocol used to transfer files over a TCP/IP network (Internet, UNIX, etc. ). For example, after developing the HTML pages for a Web site on a local machine, they are typically uploaded to the Web server, using FTP. Unlike e-mail programs in which graphics and program files have to be attached, FTP is designed to handle binary files directly and does not add the overhead of encoding and decoding the data. The ITU-T standard which defines the physical and electrical characteristics of hierarchical digital interfaces. Group of Pictures: MPEG video compression works more effectively by processing a number of video frames as a block. The TANDBERG Television Encoder normally uses a 12 frame GOP; every twelfth frame is an I frame. Graphical User Interface: The use of pictures rather than just words to represent the input and output of a program. A program with a GUI runs under a windowing system and has a screen interface capable of displaying graphics in the form of icons, drop-down menus and a movable pointer. The on-screen information is usually controlled / manipulated by a mouse or keyboard. High Power Amplifier: Used in the signal path to amplify the modulated and up-converted broadcast signal for feeding to the uplink antenna. Integrated Conditional Access Module: Embedded in the IRD and responsible for descrambling, plus packet filtering and reception. It also contains the physical interface to the subscriber?s viewing card. Intermediate Frequency: Usually refers to the 70 MHz or 140 MHz output of the Modulator in cable, satellite and terrestrial transmission applications. FFT FIFO Footprint FTP G. 703 GOP GUI HDTV HPA HSYNC Hub ICAM IEC IF Page A-4 Reference Guide: TT1222 4:2:0 Professional Receiver ST. RE. TT1222. 2 Glossary Interframe Coding Compression coding involving consecutive frames. [. . . ] These alarms are only available when the QPSK input module is fitted in the receiver. D. 2. 2 ASI Input Alarms The ASI input alarms relate to errors seen at the ASI input. Table D. 2: ASI Alarm Categories and Conditions Alarm Category ASI Input: Contents Alarm No sync Description Will alarm if the receiver can not lock to the incoming transport stream. Remedy Check signal source Default A NOTE?These alarms are only available when the ASI input module is fitted in the receiver. Reference Guide: TT1222 4:2:0 Professional Receiver ST. RE. TT1222. 2 Page D-3 Alarm Categories and Conditions D. 3 D. 3. 1 Output Stage Alarms Video Output Alarms The video output alarms relate to errors occurring in the video stream decoder. Table D. 3: Video Alarm Categories and Conditions Alarm Category Video output: Contents Alarm No stream input Error in stream Video resync Description No stream is detected in the current TS. [. . . ]