Getting Started 1 
Agilent U1602B/U1604B User’s and Service Guide  9
To Perform Self-Calibration
✔ Perform self- calibration to verify that your instrument is operating 
properly. Self- calibration performs an internal self- alignment routine to 
optimize the signal path in the oscilloscope. The routine uses internally 
generated signals to optimize circuits that affect channel sensitivity, 
offset and trigger parameters.
Let the instrument to warm up for at least 30 minutes before 
performing self- calibration. You should perform self- calibration 
according to the following recommendations:
• Every 12 months or after 2000 hours of operation
• If the ambient temperature is > 10 °C from the calibration 
temperature
• If you want to maximize the measurement accuracy
• after experiencing abnormal operation.
• to verify proper operation after repairing.
1 Press   button to access Utility mode at F4 softkey.
2 On page 3/4 of Utility mode, press F1 to start self- calibration. 
3 A self- calibration dialog box appears to alert user to remove all input 
connections to the instrument before pressing F1 to start 
self- calibration.
Disconnect all probe and meter connections to the input terminal of the instrument. 
Allow the instrument to warm up at least 30 minutes before performing 
self-calibration. Refer to “Self-Calibration    150” for more information.