Operation and Service Guide 1
Keysight E4412A and E4413A Operating and Service Guide 19
General Information
Warranty
The power sensors are warranted and certified as indicated on the inside cover of
this manual.
Instruments covered by manual
These instruments have a two-part serial number: the prefix (two letters and the
first four numbers), and the suffix (the last four numbers). The two letters identify
the country in which the unit was manufactured. The four numbers of the prefix
are a code identifying the date of the last major design change incorporated in
your Keysight Technologies product. The four-digit suffix is a sequential number
and, coupled with the prefix, provides a unique identification for each unit
produced. The contents of this manual apply directly to all serial numbers unless
otherwise indicated.
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