P77DESKEW Fixture Instructions
15.
Adjust the horizontal SCALE and horizontal POSITION so the differences in
the channel delays are clearly visible. The waveforms on the screen should
look similar to the following
fi
gure (note the delay between the two edges):
Figure 5: Signal delay between two channels
16.
Select Deskew from the Vertical menu.
17.
Select the button for the second channel that will be matched in time to the
reference channel.
NOTE.
Do the next step at a signal amplitude within the same attenuator range
(vertical scale) as your planned signal measurements. On the MSO/DPO70000C
series oscilloscope, a change to the vertical scale (Attenuator Setting) can cause
up to 100 ps variation in timing skew between channels. If you are using an
MSO/DPO70000D/DX series oscilloscope, the channel-to-channel skew will not
change with a vertical scale change.
6
P77DESKEW Fixture Instructions