Technical data

Troubleshooting 4
7000 Series Oscilloscopes Service Guide 67
✔ 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 infinite persistence in the Display menu is turned
off, then press the Clear Display softkey.
✔ Press the AutoScale key.
If you cannot see a channel
✔ Recall the default setup by pressing Save/Recall then 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 AutoScale key before an input
signal was available.
7000 service guide.book Page 67 Thursday, October 16, 2008 12:18 PM