1_MHz_SQUARE_WAVE_FOR_TDR

Published:2009/7/15 4:22:00 Author:Jessie | From:SeekIC

Fast-rise-time 1-MHz pulse generator serves with wide-band CRO and T connector for time-domain reflectometry (TDR) setup used to pinpoint exact location of fault in transmission line. Will also locate multiple faults along line, measure SWR, and measure characteristic impedance of cable. With 1-MHz square-wave source having 500-ns duration for positive portions of wave, cables up to 150 feet long can be tested. R1 should equal characteristic impedance of line being tested. U1 is Signetics N7400A or equivalent quad NAND/NOR gate. Article gives instructions for use.-W. Jochem, An Inexpensive Time-Domain Reflectometer, QST, March 1973, p 19-21.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/1_MHz_SQUARE_WAVE_FOR_TDR.html

Print this Page | Comments | Reading(3)