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Old November 3rd 10, 10:31 PM posted to rec.radio.amateur.antenna
joe joe is offline
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First recorded activity by RadioBanter: Nov 2010
Posts: 9
Default Distance to Fault

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.