OPERATION
4-3
• Moving the probe from B to C gives a higher reading and a lower tone, indicating that
the probe has moved beyond the fault.
• This implies that the fault is between B and C.
• Now move the other probe from E to give the lowest reading and the highest
frequency tone. When the reading is below about 15 mΩ, the probes should be within
a few millimetres of the short and the tone changes to a warble.
U1
E
SHORT
C
B
A
U2
Figure 4-1 Low Resistance Short
4.3 Plane Shorts
CAUTION: Disconnect power from the board under test
before using PLANE SHORTS.
NOTE: The Plane Stimulus outputs should only be connected to a PCB plane. Do not connect to PCB
tracks.
This range is effective in physically locating shorts between a track and a plane, or between two planes.
Single and multiple shorts each require a different method of location. The two methods are described in
this section.
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