Making A Power Measurement Using Broadband Detection - HP 8712ET User Manual

Making Measurements

Making a Power Measurement using Broadband Detection

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 Detection Options Narrowband Internal B
MEAS 1
for a narrowband-detection power measurement. A
narrowband-detection 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 all 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 amplifier.
Broadband power measurements are only specified for measurements
NOTE
with a start frequency of ≥10 MHz.
ET User's Guide 3-39