Tektronix TCPA300 SERIES, Instruction Manual

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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
Interface Cable or use a 50
Ω
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 M
Ω
, 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 Connections