Troubleshooting 4
6000 X-Series Oscilloscopes Service Guide 61
If the trace display is unusual or unexpected
✔ Check that the Horizontal time/division setting is correct for the expected
frequency range of the input signals.
✔ The sampling speed of the oscilloscope depends on the time/division setting. It
may be that when time/division is set to slower speeds, the oscilloscope is
sampling too slowly to capture all of the transitions on the waveform. Use peak
detect mode.
✔ Check that all oscilloscope probes are connected to the correct signals in the
circuit under test.
✔ Ensure that the probe’s ground lead is securely connected to a ground point in
the circuit under test. For high-speed measurements, each probe’s individual
ground lead should also be connected to a ground point closest to the signal
point in the circuit under test.
✔ Check that the trigger setup is correct.
✔ A correct trigger setup is the most important factor in helping you capture the
data you desire. See the User’s Guide for information about triggering.
✔ Check that persistence in the Display menu is turned off, then press the Clear
Display softkey.
✔ Press the [Auto Scale] key.
If you cannot see a channel
✔ Recall the default setup by pressing [Default Setup]. This will ensure that the
trigger mode is Auto.
✔ Check that the oscilloscope probe’s BNC connector is securely attached to the
oscilloscope’s input connector.
✔ Check that the probe clips are securely connected to points in the circuit under
test.
✔ Check that the circuit under test is powered on.
You may have pressed the [Auto Scale] key before an input signal was available.
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