Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primary calibration of AM and PM noise measurements   This report describes a method for the primary calibration of phase noise and
amplitude noise measurement systems.
  In the field of metrology, the term "primary" refers to a standard whose
quantity value and measurement uncertainty are established without relation to
another measurement standard for a quantity of the same kind; or to a procedure
used to realize the definition of a measurement unit and obtain the quantity
value and measurement uncertainty of a primary measurement standard.
Accordingly, a phase and a normalized amplitude have to rely on ratio
measurements.

2
The categories of this paper are: math
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph