8-14 Keysight N5221A/22A Service Guide
General Purpose Maintenance Procedures
Option Enable Utility
8-
Installing or Changing a Serial Number
It is necessary to reinstall the instrument serial number if the test set
motherboard is replaced.
1. To change a serial number, select Change Serial from the Option Enable
menu bar (see Figure 8-5 on page 11). The current serial number is
displayed. If no serial number has previously been entered, the word
“NONE” will be displayed.
2. VERY CAREFULLY, type the new serial number into the space provided and
then click Change.
3. If an error is made in entering the serial number, obtain a clear code from
Keysight, enter the clear code in the space provided and click CLEAR. The
correct serial number can then be entered.
Use extreme care when entering the serial number, as only one attempt is
allowed.
To change an incorrect serial number, a clear-code password is required.
Contact Keysight to obtain the clear-code. Refer to “Contacting Keysight”
on page 2-7.
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