Triplett Hound 3 – PN: 3392 - Manual (Page 16)

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7.2.2: The FOX 2, Crosstalk, and TrueTrace
Crosstalk is the bleeding of the tracer tone from the target
wire onto adjacent wires. This often happens in multiwire
cables, or in cable harnesses where many wires are bundled
together in close proximity to each other. A tracer tone ap-
plied to a target wire or wires may crosstalk onto adjacent
wires. Some wires/cables are constructed to reduce the
crosstalk, but other wire/cables crosstalk readily. So much
crosstalk can occur that the tracer tone on the adjacent wires
can be almost as large as the original tone on the target
wire. This can make it difficult to identify the target wire with
any of the HOUNDs. The traditional method of trying to de-
termine if the tone being received is the original tone, or is
crosstalk, is to short out the wires with the tone where the
HOUND is being used. If shorting the wires only reduces the
tone’s level, but does not completely kill it, then the shorted
wires have crosstalk on them, and are not the target wires.
If shorting the wires completely kills the tone, then its likely
that the wires are the target wires. Unfortunately, this is not
100% effective. The FOX 2 uses TrueTrace . . . a test tech-
nique which greatly improves the accuracy of the trace.
Shorting the target wires together causes the cadence (the
speed at which the tracer tone warbles or pulses) of the tracer
tone to change, positively identifying the target wire(s).
7.2.3: Wire Tracing Methods
There are two basic wire tracing methods . . . “floating” and
“grounded”.