Performance Tests (MSO/DPO5000 Series)
Check Delta Ti
me Measurement Accuracy
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 t
he Horizontal Scale to 4ms/divas follows:
a. Tu rn the Horizontal Scale knob to set the time per division as close as you
can t
o the desired setting. In this case, set the scale to 5ms/div.
b. Push the front-panel Acquire button.
c. Select Manual Mode.
d. Click the Record Length fieldtobringuptheonscreenkeypad.
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 5mV/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 Te rmination to 50 Ω.
4–42 MSO70000/C, DSA70000B/C, DPO7000B/C, DPO7000, MSO5000, DPO5000 Series
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