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.
|