Check Delta Time Measurement Accuracy - Tektronix MSO70000 Series Technical Reference

Performance Tests (MSO/DPO5000 Series)

Check Delta Time Measurement Accuracy

4–42
This test checks the Delta-time measurement accuracy for a given instrument
setting and input signal.
1. Connect a 50 Ω coaxial cable from the signal source to the oscilloscope
channel 1, as shown in the following illustration.
WARNING. The generator is capable of providing dangerous voltages. Be sure to
set the generator to off or 0 volts before connecting, disconnecting, and/or moving
the test hookup during the performance of this procedure.
2. Push the oscilloscope front-panel Default Setup button.
3. Set the Horizontal Scale to 4 ms/div as follows:
a. Turn the Horizontal Scale knob to set the time per division as close as you
can to the desired setting. In this case, set the scale to 5 ms/div.
b. Push the front-panel Acquire button.
c. Select Manual Mode.
d. Click the Record Length field to bring up the onscreen keypad.
e. Reduce the record length to 80% of its original value (such that 1000
points is changed to 800 points). This will change the Horizontal Scale
to the correct setting.
4. Set the Vertical Scale to 5 mV/div.
5. Set the impedance to 50 Ω as follows:
a. Set the sine wave generator output impedance to 50 Ω.
b. Push the front-panel oscilloscope Vertical Menu button.
c. Set the Termination to 50 Ω.
MSO70000/C, DSA70000B/C, DPO7000B/C, DPO7000, MSO5000, DPO5000 Series