Probing Principles
Extending DC Range
If you want to measure a low-amplitude AC component that is superimposed on an extremely large steady-state DC component
(such as in a power supply), or if you want to extend the DC current range of your probe, you can add offset (bucking) current with
a second conductor.
To supply additional bucking current:
1.
Place a second conductor that has a pure
DC component of known value in the probe
jaw with the conductor under test.
2.
Orient the second conductor so that the
bucking current
fl
ows in the opposite
direction of the DC
fl
ow in the conductor
under test.
3.
To determine measurement values, add
the value of the bucking current to the
displayed measurement.
NOTE.
Adding a second conductor to the probe increases the insertion impedance and reduces the upper bandwidth limit of the
probe. Winding multiple turns further increases the insertion impedance, further reducing the upper bandwidth limit.
34
TCP0150 Current Probe Instruction Manual
Summary of Contents for TCP0150
Page 1: ...TCP0150 20 MHz 150 A AC DC Current Probe Instruction Manual www tektronix com 071 2251 00...
Page 4: ......
Page 8: ...Table of Contents iv TCP0150 Current Probe Instruction Manual...
Page 66: ...Specifications Figure 4 Probe dimensions 50 TCP0150 Current Probe Instruction Manual...
Page 98: ...Repair Figure 5 Replaceable Parts 82 TCP0150 Current Probe Instruction Manual...
Page 100: ...Repair 84 TCP0150 Current Probe Instruction Manual...
