TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
1-1
Getting Started
The TCPA300 and TCPA400 current probe amplifiers let you use one probe to
simultaneously measure AC and DC current. The amplifiers convert the sensed
current into a proportional voltage signal that you can measure directly with an
oscilloscope.
The TCPA300 and TCPA400 current probe amplifiers provide better linearity
than other current measurement systems because of a current feedback process
used with the probe. DC measurement capability and high bandwidth allow the
amplifiers to accurately represent square waves and fast-rise signals.
The TCPA300 and TCPA400 and associated probes provide these features:
H Simultaneous DC and AC current measurements up to 750 A peak
H High sensitivity
H One-button autobalancing and probe degaussing
H No adjustments needed to match a current probe to an individual amplifier
H AC or DC coupling of signal
H Direct scaling and unit readout on compatible TEKPROBE level II
oscilloscopes
System Configuration
A complete current measurement system consists of a current probe amplifier, a
compatible current probe, and an appropriate oscilloscope. Refer to Figure 1--1.
AmplifierTest oscilloscope
Output
Input
50 Ω oscilloscope input -- use the
TEKPROBE Interface Cable or use a 50 Ω
cable. (Add 50 Ω termination here if
oscilloscope has only high-impedance input.)
Current probe
Figure 1- 1: Typical TCPA300/400 current measurement system
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