Tektronix P6021A, Instruction Manual

Page: 37 / 81

Probing Principles
Common Mode Noise/Magnetic Field Errors
Common-mode noise at high frequencies and
strong magnetic
fi elds on the supply side of
your circuit can cause measurement errors. To
avoid this:
1. Measure on the low or ground side of your
circuit.
2. Orient the probe to measure conventional
current
fl ow (from positive to negative).
NOTE. This method works best when the
negative terminal shown in the diagram is tied
to earth ground.
P6021A Current Probe Instruction Manual 16