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July 21st 03, 05:44 AM
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Did you really read what I wrote?
Roy Lewallen, W7EL W5DXP wrote: Roy Lewallen wrote: It's important not to confuse the sort of pulses or steps used in TDR with transient sine wave conditions. Why? Do they obey different laws of physics? TDR also (obviously) involves time domain analysis. But it's quite different. Why? Does a TDR obey a different set of physics laws? The reflected wave will be a simple replica of the incident wave, altered only in phase and amplitude. Not if it contains random noise and all waves contain random noise. TDR is a very valuable technique, providing important information and illuminating insights about transmission line phenomena. But great care has to be taken in extrapolating TDR observations to what happens in a sinusoidal transient or steady state environment. Why? Does a TDR obey a different set of physics laws than sine waves? |
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