Greenlee 500XP Instruction Manual page 11

500XP • 500FP
Techniques
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pair tracing products.
Telephone Pair Identification
Connect an oscillator across the pair to be traced and switch
its tone output on. Check that tone is detected at the oscillator
before leaving. If the oscillator has the facility, check that there
is no indication of a short on the pair. If there is a short, there
may be little or no signal to detect.
Move to the other end of the cable and use the 500XP/FP to find
the pair with the tone on it. Starting with higher gain, find the
general bundle of the wires that contains the tone. Gradually
reduce the sensitivity until you positively detect the tone on just
one pair of wires. If you can move this pair of wires away from
the bundle and spread them out, there should be a distinct null
in the detected signal roughly midway between the two.
LAN Cable Identification
Connect the oscillator to two wires of different pairs for an
easier to detect signal. For example, connect one lead of the
oscillator to Orange/White and the other terminal of the oscilla-
tor Blue/White.
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