The following lines were added (+) and removed (-):
== Radio Communications Cable ==An inexpensive Fast Clock Time Domain Reflectometer kit is available which can be used with a medium speed (50 MHz typically) or faster Oscilloscope. This device will determine key parameters about cable lengths, position of cable faults and assist in cable characterization. In use the TDR clock signal is 'stretched' out on the oscilloscope to display the square wave 'ringing', once achieved the test cable can be attached and the un-terminated return pulse will cause a second 'bump' in the square wave to be seen on the display (see photos in listing). Using simple math and the return path speed measured from the scope display, cable length can be determined.