User`s guide

11 Specifications and Characteristics
254 N1911A/1912A P-Series Power Meters User’s Guide
Introduction
This chapter details the P- Series power meters’s specifications and
supplemental characteristics. Information contained in this chapter refers
to operation with P- Series wideband power sensors.
Specification Definitions
There are two types of product specifications:
• Warranted specifications
• Characteristic specifications
Warranted specifications
Warranted specifications are covered by the product warranty and apply
over 0
o
C to 55
o
C, unless otherwise noted. Warranted specifications
include Measurement Uncertainty calculated with 95 % confidence.
Characteristic specifications
Characteristic specifications are not warranted. They describe product
performance that is useful in the application of the power sensors by
giving typical, but non- warranted performance parameters. These
characteristics are shown in italics or denoted as “typical”, “nominal” or
“approximate”.
Characteristic information is representative of the product. In many cases,
it may also be supplemental to a warranted specification. Characteristic
specifications are not verified on all power sensors. The types of
characteristic specifications can be placed in two groups:
• The first group of characteristic types describes 'attributes' common to
all products of a given model or option.
Examples of characteristics that describe 'attributes' are product
weight, and 50 W input Type- N connector. In these examples product
weight is an approximate value and a 50 W input is nominal. These
two terms are most widely used when describing a product's
'attributes'.