User`s guide

42 Agilent Infiniium 90000 X-Series Oscilloscopes User’s Guide
2 Using the Oscilloscope
Turning an analog channel on or off
• To turn an analog channel on or off, press the channel number key or
click the check box next to the channel number. When you turn off a
channel, the current vertical scaling factor and scale buttons for that
channel disappear.
If you are not using a particular analog channel, you can turn it off to
simplify the waveform display and increase the display update rate.
While an analog channel is turned off, data acquisition continues for
that channel. Therefore, you can still use the analog channel as a source
for functions.
Adjusting the analog channel’s vertical scale and offset
• You can use the vertical scale and offset knobs, the vertical GUI
controls, or the Channel Setup dialog box to adjust the vertical scale
and offset.
• To make the waveform bigger (fewer volts per division), turn the
vertical scale knob clockwise. To make it smaller (more volts per
division), turn the knob counter- clockwise.
The vertical scale knob is the larger of the two knobs for a channel. It
is marked with a set of sine wave symbols. Decreasing the vertical scale
makes the waveform bigger, with fewer volts displayed per division.
Increasing the vertical scale makes the waveform smaller, with more
volts displayed per division.
• You can also click in the vertical scaling field to open a pop- up
numeric keypad that lets you set an exact value for the scaling. Click
the two icons next to the field to make the waveform bigger or smaller.
• To move the waveform toward the top of the display, turn the vertical
offset knob clockwise. To move it toward the bottom of the display, turn
the knob counter- clockwise. The vertical offset knob is the smaller of
the two knobs for a channel. It is marked with a set of arrows.
• You can click and drag the ground reference indicator for the waveform
you want to move to the desired offset.
• Choose Setup > Channel N from the menu bar or click a channel number
to open the Channel Setup dialog box, in which you can set the vertical
scaling, offset, skew, and labels. You can also specify the characteristics
of a probe, or perform a probe calibration.
NOTE
Using an Analog Channel as External Trigger
Any analog channel can be used as a trigger source. If you need an external trigger but do
not need all analog channels, you can use an analog channel as an external trigger without
displaying it by turning the analog channel display off.