HP 8163A - How to Measure Power; The Power Value; How to Set the Number of Digits

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Power Measurement
How to Measure Power
This chapter describes how to use the HP 8163A Lightwave
Multimeter and the HP 8164A Lightwave Measurement System to
measure optical power.
3.1 How to Measure Power
The Power Value
The <P> parameter displays the power measurement value. In
MinMax mode, this parameter changes to <∆P>, the difference
between minimum and maximum power, see page 81.
How to Set the Number of Digits
You can set the number of digits that are used in power
measurement. These are the number of digits after the decimal
point. To change the number of digits to two:
1 Move to the Power Meter channel and press the [Menu] softkey.
2 Move to <NUMBER OF DIGITS> option and press ENTER. You
will see the screen in Figure 3-1.