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Making a Power Measurement using Broadband
Detection
Power measurements can be made using either narrowband or broadband
detection. The example in this section is of a broadband power measurement,
If
you are only interested in the output power of your device at the
same frequency as the analyzer’s source, you can select
@EEi)
D#to~tion
Options
#mawband
Internal
B
for a narrowband power
measurement. A narrowband power measurement only measures the power
within the tuned receiver’s bandwidth centered at the source frequency.
When you measure a device for absolute output power, the network analyzer
uses the broadband detection mode and measures the total power of
ah
frequencies present in the transmitted signal (B*). This signal may contain
frequencies other than the source frequency such as when the DUT is a
mixer.
This section uses an example measurement to describe how to normalize the
data and measure the total output power of an ampltier.
NOTE
Broadband power measurements are only specified for measurements with a start frequency
of
210
MHz.
3-30
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