6 Using the vLoc-5000
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7. Ensure the frequency selected on the vLoc is the same as selected on the transmitter.
8. Place the stethoscope on each of the suspected target cables with the flats of the antenna in line with the
route of the cable.
9. Note the dB reading of each cable. The one with the largest reading is likely to be the target cable.
10. If necessary adjust the sensitivity of the vLoc so that the signal is within the operating section of the bar
graph. This will help identify the cable if the signal levels are similar because of cross coupling of the
signal.
WARNING
The remote stethoscope antenna is a useful tool to help identify cables.
However, it should not be used as positive identification before an unused cable
is cut. Always follow company procedures when cutting disused or isolated
cables.
TIP
The remote antenna USB stethoscope can be used to help identify disused and
isolated cables. This process can be further enhanced if the cable is isolated and
is of a twisted cable construction.
Method:
1. Connect the transmitter to two of the cores of the cable. At the far end short together these two
conductors making a loop.
2. Set the transmitter to a low frequency such as 640Hz and set the output to maximum.
3. At the point of interest, run the remote stethoscope antenna along the suspected target cable. If the
correct cable is being assessed the signal will increase and decrease in sympathy with the twist of the
two conductors within the cable.
4. If the signal is a steady level and does not rise and fall, this is probably NOT the target cable.
WARNING
The remote stethoscope antenna is a useful tool to help identify cables.
However, it should not be used as positive identification before an unused cable
is cut. Always follow company procedures when cutting disused or isolated
cables.
Signal response
from target line
Flat response
from cable that is
not target cable
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