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Distance to Fault
On Nov 3, 10:31*pm, joe wrote:
K1TTT wrote: On Nov 3, 6:22 am, ashwanthh wrote: Hi all, For my project, I want to perform Distance to fault measurement in the cable connecting the antenna. The principle is that a signal should be sent to the cable and using the forward and reflected voltage VSWR should be calculated and should be viewed in a spectrum analyzer. My question is 1. *What transducer is used to detect the transmitted/reflected signals from the cable? 2. Should the transducer be connected in series or parallel? Anyone, Please help -- ashwanthh look up time domain reflectometers... they are much simpler than what you are thinking of. *using a simple step input wave you measure the time to the reflection. *if you get fancy you can measure the polarity and size of the reflection to determine if it is a short or open or impedance change... if you really get fancy you can hook a scope up and look at more details. *the only transducer needed is a voltage probe OR a current shunt, either one will work depending on the installation needs. If the school project requires him to use a Spectrum Analyzer, then the time domain may not be an option. if the school project is requiring a spectrum analyzer to measure distance to a fault location then its a pretty dumb project. there are much better and more straight forward ways to do that. |
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