Newport 1936-R series User Manual

122 Principles of Operation
Figure 68 Time Varying Signal Measurements.
Many different measurements can be made on different portions of a time varying signal. The
most common are: DC power, peak power, and peak-to-peak power.
9.8 Integration of Detector Signals
The 1936/2936 Series provides for making measurements that integrate
incoming power detector signals to obtain an energy via the CW Integrate
mode. In CW Integrate mode, the display units indicate Joules since energy
is the time integral of power:



1
0
1
0
t
t
t
t
dt
)(R
)t(S
dt)(P)(E
As the detector signal actually consists of a stream of digitized values, the
integral becomes a numerical approximation using the trapezoid method.
See Figure 69.
Figure 69 Integrated Energy Via a Trapezoid Approximation.
The INTG measurement mode performs a discrete integration at a 400 Hz sample rate.

Newport 1936-R series Specifications

General

Brand	Newport
Model	1936-R series
Category	Measuring Instruments
Language	English