Performance Ver
ification
Check Input Termination, DC Coupled (Resistance)
This test checks the Input Termination for 1 M,75 or 50 settings.
NOTE. The 75 Ω setting is not available on M DO310X instruments.
1. Connect the output of the oscilloscope calibrator (for example, F luke 9500) to the oscilloscope channel 1 input, as
shown below.
2. Push Default Setup on the front panel to set the instrument to the factory default settings.
3. Push the channel button on the front panel for the oscilloscope channel that you are testing, as shown in the test
record (
for example, 1, 2 , 3,or4).
4. Confirm t
hat the oscilloscope termination and calibrator impedance are both set to 1 M. T he default Termination
setting is 1MΩ.
5. Turn the Vertical Scale knob to set the vertical scale, as shown in the test record (for example, 10 mV/div, 100 mV/div,
1 V/div). (See page 36, Input Termination Tests.)
6. Measure the input resistance of the oscilloscope with the calibrator. Record this value in the test record.
7. Repeat steps 5 and 6 for each volt/division setting in the test record.
8. Change the oscilloscope termination to 75 and calibrator impedance to 50 and repeat steps 5 through 7.
9. Change the oscilloscope termination to 50 and repeat steps 5 through 7.
10. Repeat steps 4 through 9 for each channel listed in the test record and relevant to the model of oscilloscope that you are
test
ing, as shown in the test record (for example, 2, 3,or4).
This
completes the procedure.
MDO3000 Series S pecifications and Performance Verification 73
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