Acquire the Sign
al
4. Select the desired side-bezel setting.
Autoset
Enabled
Autoset
Disabled
Quick Tips
To position the waveform appropriately, Autoset may change the vertical position. Autoset always sets vertical offset
to0V.
If you use Autoset when no channels are displayed, the oscilloscope turns on channel one (1) and scales it.
If you use Autoset and the oscilloscope detects a video signal, the oscilloscope automatically sets the trigger type to
video and makes other adjustments to display a stable video signal.
To manually set the oscilloscope to view a video signal in an IRE graticule:
1. Set the Trigger Type to Video.
2. Set the Vertical Scale to 143mV/div.
3. Select the proper input channel Attenuation for the probe or cable being used to feed the video signal to the
oscilloscope.
4. If necessary, connect a 75 ohm pass-through terminator to the oscilloscope input. For example, you need to add a
terminator when you use a 75-ohm cable between the video signal and the oscilloscope.
Acquisition Concepts
Before a signal can be displayed, it must pass through the input channel where it is scaled and digitized. Each channel
has a de
dicated input amplifier and digitizer. Each channel produces a stream of digital data from which the oscilloscope
extracts waveform records.
Sampling Process
Acqui
sition is the process of sampling an
analog signal, converting it into digital
data, and assembling it into a w aveform
reco
rd, which is then stored in acquisition
memory.
Input signal
Sampled points
Digital values
MSO2000B and DPO2000B Series Oscilloscopes User Manual 45
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