Performance Verification
TCA75 Impedance Conversion Adapter Instructions
11
5.
Record the measurement results in the test record.
6.
Calculate the attenuation factor by dividing the voltage that you measured in
step 4 (the adapter output) into 1.000 V (the adapter input, from step 3).
7.
Record the calculated results in the test record.
8.
Power off the power supply, and disconnect the test setup.
Probe Calibration Routine
This is a functional check of the TCA75 adapter that uses the probe calibration
output signal and probe calibration feature of the oscilloscope.
1.
Connect the TCA75 adapter to any channel on the oscilloscope.
2.
Connect a 75
Ω
coaxial cable between the TCA75 adapter input and the
PROBE COMPENSATION output connector on the oscilloscope. The test
setup is now connected as shown in Figure 7.
TDS7404 Oscilloscope
75
Ω
BNC cable
TCA75 A
dapter
Probe
compensation
output
Figure 7: Probe setup
3.
Select Probe Cal from the Vertical menu on the oscilloscope.
4.
When the calibration routine completes, verify that the Pass message
displays. Record the results on the test record.
This completes the performance verification of the TCA75 adapter.
