Tektronix TCP300A, User Manual

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Getting Started
The TCPA300 and TCPA400 current probe ampli fi ers let you use one probe to
simultaneously measure AC and DC current. The ampli fi ers convert the sensed
current into a proportional voltage signal that you can measure directly with an
oscilloscope.
The TCPA300 and TCPA400 current probe ampli fi ers 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
ampli
fi ers to accurately represent square waves and fast-rise signals.
The TCPA300 and TCPA400 ampli fi ers and associated probes provide these
features:
Simultaneous DC and AC current measurements up to 750 A peak
High sensitivity
One-button autobalancing and probe degaussing
No adjustments needed to match a current probe to an individual ampli fi er
AC or DC coupling of signal
Direct scaling and unit readout on compatible TEKPROBE level II
oscilloscopes
System Con fi guration
A complete current measurement system consists of a current probe ampli fi er, a
compatible current probe, and an appropriate oscilloscope. (See Figure 1.)
Figure 1: Typical TCPA300/400 current measurement system
1. 50 Ω oscilloscope input — use the TEKPROBE Interface Cable or use a
50 Ω cable. (Add a 50 Ω termination here if the oscilloscope only has a
high-impedance input).
TCPA300/400 Ampli fi ers and TCP300A/400 Series Current Probes User Manual 1