TCP303 and TCP404XL Performance Verification
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
5-39
Bandwidth (TCP303)
This procedure tests the bandwidth of the TCP303 Current Probe. In this test you
measure a signal at a relatively low frequency and again at the rated bandwidth
of the probe. The two measurements are compared to verify that the signal
amplitude does not fall below --3 dB at the probe bandwidth. Refer to
Figure 5--12 when making equipment connections.
Leveled
sine wave
generator
Output
Test oscilloscope
Current probe
HF Current
loop
50 Ω oscilloscope input -- use the TekProbe
InterfaceCableorusea50Ω cable. (Add
50 Ω termination here if oscilloscope has
only high-impedance input.)
Amplifier
Figure 5- 12: Bandwidth test setup for TCP303
1. If you are using a Tektronix oscilloscope that supports the TekProbe Level 2
Interface, use the TekProbe Interface Cable to connect the amplifier
OUTPUT to the oscilloscope input. If you are not using a Tektronix
oscilloscope that supports the TekProbe Level 2 Interface, use a 50 Ω BNC
cable. If the input impedance of your oscilloscope is 1 MΩ, connect a 50 Ω
feedthrough termination at the oscilloscope input. Do not connect the
termination at the amplifier output.
2. Connect the current probe to the amplifier PROBE INPUT.
3. Connect the HF current loop to the output of the leveled sine wave generator.
Equipment C onnections
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