Adjustment Procedure
Deskew
Complete these steps to set the calibrator output for deskew.
NOTE.
If you are adjusting an MSO4000B Series, and the oscilloscope prompts
you to connect the digital channels, connect the digital probe according to
the instructions in Connecting the Equipment. (See page 9, Connecting the
Equipment.)
1.
Set the calibrator output signal type as follows:
a.
Push the
Aux
front-panel button.
b.
Push the
Zero skew
side-bezel button.
NOTE.
Selecting the deskew signal automatically turns all channels on.
2.
Set the calibrator termination and output channels as follows:
a.
Push the
CHANNEL SELECT
lower-bezel button.
b.
Select the channel(s) speci
fi
ed by the oscilloscope prompt.
c.
Push the
LOAD
lower-bezel button to highlight either
1 M
Ω
or
50
Ω
, as
speci
fi
ed by the oscilloscope prompt.
d.
Push the
EXIT
lower bezel button.
3.
Set the calibrator amplitude as follows:
a.
Select the
Amplitude
fi
eld using the front-panel tab key
.
b.
Set the voltage speci
fi
ed by the oscilloscope prompt.
4.
Set the calibrator frequency as follows:
a.
Select the
Frequency
fi
eld using the front-panel tab key
.
b.
Set the frequency speci
fi
ed by the oscilloscope prompt.
5.
Push the
ON
button and verify that the red light turns on to indicate that
the calibrator output is on.
6.
On the oscilloscope, push the
OK Do Next Step
right-bezel button. In some
cases, the deskew can take several minutes.
CAUTION.
Keep the digital probe plugged in to the oscilloscope. Unplugging the
probe can abort the adjustment.
16
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
