Tektronix MSO70000 Series Technical Reference page 168

Performance Tests (MSO70000/C Series, DSA/DPO70000B/C Series, and DPO7000 Series)
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2. Check input impedance against limits:
a. Measure the impedance: Read and record the measured impedance.
b. Remove the dual banana connector from the digital multimeter (DMM),
turn it 180 degrees and reinsert it in the DMM input.
c. Measure the impedance: Read and record the measured impedance.
d. Add the two measurements and divide the result by 2.
e. Subtract the resistance of the multimeter leads from the average that you
calculated.
f. Enter the result on the test record.
g. Check - The measurement is within the limits specified in the test record.
3. Set the Vertical Scale to 100 mV per division and repeat step 2.
4. Repeat steps 2 through 3 for the remaining input channels:
a. Move the test setup to an unchecked input channel.
b. Set the Vertical Scale of the channel to 10 mV per division.
c. Repeat steps 2 through 3.
5. Disconnect the hookup: Disconnect the equipment from the instrument.
MSO70000/C, DSA70000B/C, DPO7000B/C, DPO7000, MSO5000, DPO5000 Series