2 Initial Setup
62 InfiniiVision Oscilloscopes User’s Guide
• 1M Ohm mode is for use with many passive probes and for general-purpose
measurements. The higher impedance minimizes the loading effect of the
oscilloscope on the device under test.
5 Press the BW Limit softkey to turn on bandwidth limiting.
Pressing the BW Limit softkey turns the bandwidth limit on or off for the selected
channel. When bandwidth limit is on, the maximum bandwidth for the channel is
approximately 25 MHz. For waveforms with frequencies below this, turning bandwidth
limit on removes unwanted high frequency noise from the waveform. The bandwidth
limit also limits the trigger signal path of any channel that has BW Limit turned on.
When BW Limit is selected, “BW” is illuminated on the front panel next to the
channel position knob ( ).
6 Press the Invert softkey to invert the selected channel.
When Invert is selected, the voltage values of the displayed waveform are inverted.
Invert affects how a channel is displayed, but does not affect triggering. If the
oscilloscope is set to trigger on a rising edge, it remains set to trigger on a same edge
(triggers at the same point on the waveform) after the channel is inverted.
Inverting a channel will also change the result of any function selected in the
Waveform Math Menu or any measurement.
7 Press the Probe softkey to display the Channel Probe Menu.
This menu lets you select additional probe parameters such as attenuation factor and
units of measurement for the connected probe.
• Probe Units — Press the Units softkey to select the proper measurement unit for
the connected probe. Select Volts for a voltage probe and select Amps for a current
probe. Channel sensitivity, trigger level, measurement results, and math functions
will reflect the measurement units you have selected.
Attenuation
factor
Measurement
units
Skew adjust
Return to
previous menu
Calibrate
probe
Probe calibration not needed, not available when this softkey is ghosted.
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