Agilent Technologies Agilent 8163A User Manual

Power Measurement How to Measure Power
88 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
How to Set the Reference Level
How to Input a Reference Level
dB results are shown relative to a reference level. The [Ref] parameter sets
the reference level. Setting, or changing, the reference only affects results
that are displayed in dB.
The reference level is displayed in units of dBm or Watts. Depending on
which is selected the following equations are used to calculate the power
level in dB:
P
display
(dB) = P
measured
(dBm) − REF(dBm)
or
Where,
P
display
is the displayed relative power,
P
measured
is the absolute power level (see “How to Set the Calibration Offset”
on page 87), and
REF is the reference level.
You can choose the units for the reference using the Power Unit softkey. If
you choose dB, the power value changes to dB and the displayed
reference level changes to dBm.
To set the reference level to 10 mW:
1 Move to the Power Meter channel and press the [Details] softkey.
2 Move to the [Ref] parameter and press the [Power Unit] softkey.
3 Move to <W> and press Enter twice.
4 Change the units to mW using the [Unit+] and [Unit−] softkeys.
5 Enter 10.000 and press Enter.
How to Set the Reference Value to the Current Power
Value
In addition to entering a new reference value, you can change the
reference value to the currently displayed power value by pressing the
[Dsp->Ref] softkey.
Pressing the [Dsp->Ref] softkey takes the input power level and stores it
as the reference. Setting the reference only affects results displayed in dB.
P
display
dB() 10
P
measured
W()
REF W()
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Agilent Technologies Agilent 8163A Specifications

General

Brand	Agilent Technologies
Model	Agilent 8163A
Category	Multimeter
Language	English