поискавой системы для электроныых деталей |
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AD-2039C датащи(PDF) 5 Page - Bothhand USA, LP. |
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AD-2039C датащи(HTML) 5 Page - Bothhand USA, LP. |
5 / 5 page ADSL CPE SIDE SPLITTER P/N: AD-2039C DATA SHEET BOTHHAND USA Bothhand USA. e-mail: sales@bothhandusa.com http://www.bothhand.com 462 Boston St - Topsfield, MA 01983 - Phone: 978-887-8050 - Fax: 978-887-5434 undesirable reflection and echoes which in long distance circuit the telephone user or destroy the date being sent To perform the return loss test ,open ,short, load calibration must be done prior measurement while the LCZ impedance Analyzer being selected in impedance mode. Return loss is general expressed in decibels. General Return loss equation as below. Return loss=20 log| ZNLr + Zm / ZNLr- Zm ︱dB Where ZNL = the reference impedance Zm= the measured impedance The test setup is shown in drawing below: Figure 2 1:ZNL-r=1330 ohm in parallel with series connection of a 348ohrn resistor and a 100nF capacitor (long loop model seen from RT). 2:ZH-r is the impedance presented to the POTS connection by an ATU-R. Remote POTS Splitter Returloss reference impedance 900ohrn + 2.16uF TEST Loop LPF ZH-r TEST Equipment xDSL ZNL-r |
Аналогичный номер детали - AD-2039C |
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Аналогичное описание - AD-2039C |
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