6 Service and Maintenance
128 Agilent U1602B/U1604B User’s and Service Guide
• If there is no trace display
✔ Recall factory default setting by pressing button on the front
panel. Press F1 to enter Save/Load Setup menu, in the page 1/4, then
press F1 to restore factory default setting.
✔ Check that the scope probe lead wires are securely inserted into the
connector assembly and that the probe clips are making good contact
with the probe lead wires.
✔ Check that the circuit under test is powered on, probe clips are
securely connected to test points on the circuit under test, and ground
is connected.
✔ Press Autoscale button to allow the instrument to automatically trigger
the signal to the best display.
✔ Contact Agilent Technologies Service Center to obtain technical
assistance, if necessary.
• If the trace display is unusual or unexpected
✔ Check that the horizontal time/division is correctly set for the expected
frequency range of the input signals.
✔ Check that all scope probes are connected to the correct signals on the
circuit under test, and ground lead is securely connected to ground of
the circuit under test.
✔ The trigger setup is the most important factor in capturing the signal
you desire. Check that the trigger setup is correct.
✔ Check that infinite persistence in the Display menu is turned off. Press
Clear Display to remove the display.
✔ Press the Autoscale button to allow the instrument to automatically
trigger the signal to the best display.
✔ Contact the Agilent Technologies Service Center to obtain technical
assistance, if necessary.
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