BK Precision 2560B Series, Руководство пользователя

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Digital Channels
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8.2 Connecting the Digital Probes
1. If necessary , turn off the power supply to the device under test.
– Turning off power to the device under test only prevents damage that might occur if two lines are accidentally
shorted when connecting the probes. The oscilloscope can be powered on because no voltage appears at the
probes.
2. Connect the digital probe cable to the D0-D15 connector located on the front panel.
3. Connect a SMD Mini-grabber test clip to one of the digital ground pins of the probe and then connect the grabber
to ground in the device under test.
– This will improve the signal fidelity and makes sure the oscilloscope gives accurate measurements.
4. Connect a flying lead probe to one of the digital channel pins; connect a grabber to the flying lead probe, and then
connect the grabber to the node in the circuit to be tested.
5. Repeat step 4 until all points of interest are connected.
Figure 8.2 Connecting Digital Probes
8.3 Acquiring Digital Waveforms
To acquire digital waveforms:
• Press the Digital button to open the digital channels and start acquiring waveforms.
Press the Run/Stop or Single key to run the oscilloscope, the oscilloscope examines the input voltage at each input
probe. When the trigger conditions are met the oscilloscope triggers and displays the acquisition.
For digital channels, each time the oscilloscope takes a sample it compares the input voltage to the logic threshold. If
the voltage is above the threshold, the oscilloscope stores a 1 in sample memory; otherwise, it stores a 0.
Digital data can be stored as waveform files. Horizontal cursors and most of the horizontal measurements also apply to
digital waveforms.