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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Test loop translator ： ウィキペディア英語版 Test loop translator A test loop translator (TLT) is a type of radio frequency converter or heterodyne, used to translate between uplink and downlink segments (generally in the same band), to allow for "loop-back" testing and calibration of a satellite ground segment without the need to interface with the satellite.〔(【引用サイトリンク】website=http://www.novella.co.uk/test_loop_tech.htm )〕〔(【引用サイトリンク】url=http://atlanticsat.com/ASC710C.htm )〕 The test loop translator is an extremely valuable tool for evaluating the performance of satellite earth stations. It allows the user to carry out analysis, alignment and testing without incurring satellite airtime costs and the risk of interfering with other satellite users. Thus, it has applications during equipment development, qualification, trouble-shooting and in-service routine monitoring.〔(【引用サイトリンク】url=http://www.atlantecrf.com/pdf_downloads/MJ%20Article%20-%20Loop%20Test%20Translators.pdf )〕 TLTs generally contain a fixed or preset local oscillator and a preset gain, though the LO and gain may be adjustable in some models.〔 Most models have a negative gain (i.e., a loss), with -15 dB being the most common.〔 Test loop translators can cover one or more of the satellite communication bands S, C, X, Ku, DBS and Ka.〔(【引用サイトリンク】url=http://www.atlantecrf.com/products/satellite_communications_equipment/loop_test_translators/s_c_x_ku_dbs_bands.htm )〕 〔(【引用サイトリンク】url=http://www.atlantecrf.com/products/satellite_communications_equipment/loop_test_translators/ka_bands.htm )〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Test loop translator」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.