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59.6
512Hz120dB
4. Note the strongest signal as displayed on the bar graph in conjunction with the
dB gain setting. The strongest signal will indicate the probable target cable.
TIP
The remote antenna 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 twisted cable
construction.
WARNING
Only attempt this on disused, de-energized cables.
2.3 Enhanced "loopback" method of cable identication
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 cables conductors twist within the cable.
4. If the signal is a steady level and does not rise and fall, this is probably not the
target cable.
TIP
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