Tektronix TCPA300 SERIES, Instruction Manual

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TCPA300 and TCPA400 Performance Verification
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
5- 9
Bandwidth
This procedure tests the bandwidth of the TCPA300 and TCPA400 amplifiers. In
this test you measure a signal at a relatively low frequency and again at the upper
test frequency. The two measurements are compared to verify that the signal
amplitude does not fall below a certain limit. Refer to Figure 5--3 when making
equipment connections.
Leveled
sine wave
generator
Output
Test oscilloscope
Amplifier
TekProbe interface cable or
50
Ω
coaxial cable
Calibration
adapter
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.)
Note: If using a Wavetek 9100, use the Signal Out
BNC connector on the rear of the instrument.
Figure 5- 3: Bandwidth test setup
1. If you are using a Tektronix oscilloscope that supports the TekProbe Level 2
Interface, use the TekProbe interface cable to connect the amplifier
OUT-
PUT 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 Calibration Adapter to the amplifier PROBE INPUT .
3. Make or verify the equipment settings in Table 5--6:
Table 5- 6: Equipment settings for bandwidth check
Oscilloscope
Vertical input impedance 50
Ω
Time base TCPA300
TCPA400
40 ns/division
80 ns/division