MPO6002EDU Series Oscilloscope Guide

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The following figure shows the Channel 1 Menu that appears after pressing the [1] channel key

The ground level of the signal for each displayed analog channel is identified by the position of the icon at

the far-left side of the display.

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To turn waveforms on or off (channel or math)

1 Press an analog channel key turn the channel on or off (and to display the channel's menu).

When a channel is on, its key is illuminated.

NOTE Turning channels off

You must be viewing the menu for a channel before you can turn it off. For example, if channel 1 and channel

2 are turned on and the menu for channel 2 is being displayed, to turn channel 1 off, press [1] to display the

channel 1 menu; then, press [1] again to turn channel 1 off.

To adjust the vertical scale

1 Turn the large knob below the channel key marked   to set the vertical scale

(volts/division) for the channel.

The vertical scale knob changes the analog channel scale in a 1-2-5 step sequence (with a 1:1 probe attached)

unless fine adjustment is enabled.

The analog channel Volts/Div value is displayed in the status line.

The default mode for expanding the signal when you turn the volts/division knob is vertical expansion about the

ground level of the channel; however, you can change this to expand about the center of the display.

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To adjust the vertical position

1 Turn the small vertical position knob to move the channel's waveform up or down on the display.

The offset voltage value represents the voltage difference between the vertical center of the display and the

ground level icon. It also represents the voltage at the vertical center of the display if vertical expansion is

set to expand about ground.

To specify channel coupling

Coupling changes the channel's input coupling to either AC (alternating current), DC (direct current),

or GND (ground).

TIP

If the channel is DC coupled, you can quickly measure the DC component of the signal by simply noting

its distance from the ground symbol.

If the channel is AC coupled, the DC component of the signal is removed, allowing you to use greater

sensitivity to display the AC component of the signal.

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1 Press the desired channel key.

2 In the Channel Menu, press the Coupling softkey to select the input channel coupling:

* DC - DC coupling is useful for viewing waveforms as low as 0 Hz that do not have large DC offsets.

* AC - AC coupling is useful for viewing waveforms with large DC offsets.

* GND - When the coupling mode is "GND", the DC and AC components of the signal under test are both blocked.

When AC coupling is chosen, you cannot select 50Ω mode. This is done to prevent damage to the oscilloscope.

AC coupling places a 10 Hz high-pass filter in series with the input waveform that removes any DC offset voltage

from the waveform.

Note that Channel Coupling is independent of Trigger Coupling.

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To specify channel input impedance

NOTE

When you connect an AutoProbe, self-sensing probe, the oscilloscope automatically configures the analog

input channels to the correct impedance.

1 Press the desired channel key.

2 In the Channel Menu, press Impedance; then, select either:

* 50 Ohm - matches 50 ohm cables commonly used in making high frequency measurements, and 50 ohm

active probes.

When AC coupling is selected or excessive voltage is applied to the input, the oscilloscope automatically

switches to 1M Ohm mode to prevent possible damage.

* 1M Ohm - 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.

This impedance matching gives you the most accurate measurements because reflections are minimized along

the signal path.

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To specify bandwidth limiting

1 Press the desired channel key.

2 In the Channel Menu, press the BW Limit softkey to enable or disable bandwidth limiting.

When bandwidth limit is on, the maximum bandwidth for the channel is approximately 20 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.

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To change the vertical scale knob's coarse/fine adjustment setting

1 Push the channel's vertical scale knob (or press the channel key and then the

Adjust softkey in the Channel Menu) to toggle between fine and coarse adjustment of the vertical scale.

When Fine adjustment is selected, you can change the channel's vertical sensitivity in smaller increments.

The channel sensitivity remains fully calibrated when Fine is on.

The vertical scale value is displayed in the status line at the bottom of the display.

When Fine is turned off, turning the volts/division knob changes the channel sensitivity in a 1-2-5 step sequence.

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Setting Analog Channel Probe Options

MPO6002EDU allows you to set the probe attenuation manually. To obtain the correct measurement results, you must

set the probe ratio properly. By default, the probe ratio is 1X.

1 Press the probe's associated channel key.

2 In the Channel Menu, press the Probe softkey to continuously or rotate the V0 knob to select the desired probe ratio.

Following attenuation factor are selectable for the connected probe.

NOTEAfter the oscilloscope auto-recognized certain probes with a fixed attenuation ratio, the probe ratio will also be auto

recognized. You do not have to set it manually.

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To invert a waveform

1 Press the desired channel key.

2 In the Channel Menu, 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. However, when using basic triggers, the oscilloscope attempts to maintain the same trigger point by

changing trigger settings.

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Inverting a channel also changes the result of any math function selected in the Waveform Math Menu or

any measurement.