Triplett Fox & Hound 3 – PN: 3397 - Manual (Page 35)

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It can be done, but the HOUND 3 must be held very close to
the end of the cable to pick up any signal. To apply a floating
signal to a coax, connect one clip of the FOX to the center
conductor of the coax, and the other clip to the shield of the
coax.
The grounded method often works better for tracing coaxial
cables. Connect one clip of the FOX to a ground or fake
ground, and the other clip to the shield of the coax. This
method will cause the coax to radiate enough tracer tone to
trace the coax thru drywall.
To identify the coax, if using the floating method, momen-
tarily short the shield and center conductor together while
listening to the FOX signal with the HOUND 3. If the FOX
signal is completely killed (not heard on the HOUND 3), the
selected coax is probably the target coax. If the signal is not
completely killed, the wrong coax has been selected, or there
is an open fault in the coax, and crosstalk is being picked up
from the other wires.
To identify the coax, if using the grounded method, momen-
tarily short the shield to ground while listening to the FOX
signal with the HOUND 3. If the FOX signal is completely
killed (not heard on the HOUND 3), the selected coax is prob-
ably the target coax. If the signal is not completely killed,
the wrong coax has been selected, or there is an open fault
in the coax, and crosstalk is being picked up from the other
coaxes. (This will not work if a fake ground is being used.
An actual ground is required to perform this test).