Technical data

Contacting Keysight Technologies 7
N1911A/1912A P-Series Power Meters Service Guide 117
Instrument Serial Numbers
Keysight Technologies makes frequent improvements to its products to
enhance their performance, usability and reliability. Keysight Technologies
service personnel have access to complete records of design changes for
each instrument. The information is based on the serial number and
option designation of each power meter.
Whenever you contact Keysight Technologies about your power meter have
a complete serial number available. This ensures you obtain the most
complete and accurate service information. The serial number can be
obtained by:
• Querying the power meter over a remote interface (via the *IDN?
Command).
• From the front panel (via the Service menu).
• From the serial number label.
The serial number label is attached to the rear of each Keysight
Technologies instrument. This label has two instrument identification
entries. The first provides the instruments serial number and the second
provides the identification number for each option built into the
instrument.
The serial number is divided into two parts: the prefix (two letters and
the first four numbers), and the suffix (the last four numbers).
The prefix letters indicate the country of manufacture. This code is based
on the ISO international country code standard, and is used to designate
the specific country of manufacture for the individual product. The same
product number could be manufactured in two different countries. In this
case the individual product serial numbers would reflect different country
of manufacture codes. The prefix also consists of four numbers. This is a
code identifying the date of the last mojor design change.
The suffix indicates an alpha numeric code which is used to ensure
unique identification of each product throughout Keysight Technologies.