Tektronix TCP303, Safety Instructions

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Installation
TCPA300 and TCPA400
ampli fi ers
The ampli fi er ampli fi es the current sensed by the probe and converts the current
to a proportional voltage that is displayed on an oscilloscope or other similar
measuring device.
Current probes The following Tektronix current probes are compatible with the
TCPA300 Ampli
fi er:
TCP312A (30 A, 100 MHz)
TCP305A (50 A, 50 MHz)
TCP303 (150 A, 15 MHz)
The following Tektronix current probe is compatible with the TCPA400 Ampli fi er:
TCP404XL (750 A 1 , 2 MHz)
1
500 A continuous, 750 A DC derated with duty cycle
Oscilloscope An oscilloscope displays the output from the current measuring system. A 50 Ω
cable is included to connect the ampli fi er to the oscilloscope input channel. A
TEKPROBE-to-TEKPROBE interface cable is also included for connecting to
TEKPROBE level II oscilloscopes.
If the oscilloscope does not have an input that can be set to 50 Ω impedance, you
need a feedthrough 50 Ω termination. This termination is available as a standard
accessory with your TCPA300 and TCPA400 Current Probe Ampli fi ers.
Connect the ampli fi er to an oscilloscope
You will need an oscilloscope to display the TCPA300 and TCPA400 measurement
output. To use the full dynamic range of the probe/ampli
fi er combination, the
oscilloscope must be capable of displaying a vertical scale factor of 1 mV/div to
1 V/div.
If you are using a TEKPROBE II-compatible oscilloscope, use the supplied
TEKPROBE-to-TEKPROBE interface cable to connect the ampli
fi er OUTPUT
connector to your oscilloscope. Otherwise, use a 50 Ω BNC cable (available
as an optional accessory) to connect the ampli fi er OUTPUT connector to your
oscilloscope. (See Figure 1 on page 13.)
The input impedance of the oscilloscope channel must be 50 Ω , or you will
encounter slowed pulse response, increased aberrations, or incorrect DC
measurement amplitudes. If your oscilloscope provides only 1 M
Ω inputs,
you need to attach a 50 Ω feed-through termination (available as an optional
accessory) between the oscilloscope input and the BNC cable. Do not install this
termination at the ampli
fi er end of the BNC cable.
14 Ampli fi ers and Current Probes Compliance and Safety Instructions