Measuring Noise-Like Signals Using The Channel Power Measurement - Keysight X Series Measurement Manual

Measuring Noise-Like Signals Using the Channel Power Measurement

You may want to measure the total power of a noise-like signal that occupies some
bandwidth. Typically, channel power measurements are used to measure the total
(channel) power in a selected bandwidth for a modulated (noise-like) signal.
Alternatively, to manually calculate the channel power for a modulated signal, use
the noise marker value and add
of the characteristics of the signal, or if there are discrete spectral components in the
band of interest, you can use the channel power measurement. This example uses the
noise of the analyzer, adds a discrete tone, and assumes a channel bandwidth
(integration bandwidth) of 2 MHz. If desired, a specific signal may be substituted.
Step
1 Set the analyzer to the
Spectrum Analyzer mode
2 Preset the analyzer.
3 Set the center frequency,
4 Start the channel power
measurement.
5 Enable the bar graph.
6 Enable the internal
50 MHz amplitude
reference signal.
7 Optimize the analyzer
attenuation level setting.
Measuring Noise-Like Signals Using the Channel Power Measurement
×
10 log channel BW
Action
• Press Mode, Spectrum Analyzer.
• Press Mode Preset.
• Press FREQ Channel, Center
Freq, 50, MHz.
• Press Meas, Channel Power,
• Press View/Display, Bar Graph,
On.
• Press Input/Output, RF
Calibrator, 50 MHz.
• Press AMPTD, Attenuation,
Adjust Atten for Min Clip.
81
( )
. However, if you are not certain
Notes
This enables the spectrum
analyzer measurements.
This adds a discrete tone to see
the effects on the reading.
Your display should be similar
to Figure 7-6.
Measuring Noise