79
Measuring Power
Measuring Absolute and Relative Power
Measuring the Fluctuation of Optical Power
You can measure the fluctuation of the optical power even if it is
rather small compared to the average power radiated.
You can specify the method of measurement and display and the
number of samples to be taken into account.
1
Press M
ORE
.
2
Press
M
IN
/M
AX
.
3
Wait.
The instrument begins to measure. The bargraph at the bottom of
the display window shows its progress.
The display shows the power variation, i.e. the difference between
the highest and the lowest power value measured in a specified
number of samples.
The “Win. Size”
parameter is not available
in continuous mode.
Win. Size
The parameter “Win. Size” shows the number of
samples used to determine the highest and lowest power value. By
repeatedly pressing
W
IN
. S
IZE
you can set the number of samples to
be taken to 100, 500, 1000, or back to 50.
The samples constitute the time window represented by the
bargraph.
Win. Mode
The parameter “Win. Mode” shows the current
measurement mode.
Standard setting is “Sliding”: First, the instrument takes the number
of samples defined by “Win. Size” and stores the measured values.
After the window buffer is filled, the difference between the
Figure 5-4
Powermeter Minimum/Maximum Display
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