Chapter 2 57
One-Button Measurement Functions
MEASURE (Spectrum Analysis Mode)
One-Button Measurement Functions
2.2.3 Meas OffThis key accesses the core spectrum analysis measurement functionality. It turns off the
current one-button measurement so there are no keys available in the Meas Setup menu.
See the spectrum analysis measurement features described in Volume 1 “Core Spectrum
Analyzer Functions”.
Key Path: MEASURE
Saved State: Saved in state
Factory Preset: Meas Off is selected.
Remote Command:
:CONFigure:SANalyzer
Example: CONF:SAN
2.2.4 Channel Power Channel Power measures the power and power spectral density in the channel bandwidth
that you specify. One marker pair on the display indicates the edges of the channel
bandwidth. The center frequency, reference level, and channel bandwidth must be set by
the user. For more information see “Meas Setup (Channel Power—CHP)” on page133.
You can configure measurement settings by pressing Meas Setup after selecting Channel
Power. You can make a measurement in single or continuous sweep mode. Pressing Meas
Control enables you to pause or restart a measurement, or toggle between continuous and
single measurement. To set RefLevel automatically, use Optimize Ref Level.
The power calculation method used to determine the channel power is a traditional
method known as the integration bandwidth (IBW) method. A swept spectrum is used as
the basis for this calculation. Therefore, it is important to set the resolution bandwidth
correctly before making this measurement using the following formula:
Where k is a value between 1.2 and 4.0 and n is the number of trace points.
NOTE Because of the noise-like nature of the signals being measured, the video
bandwidth should be ≥ 10 times the resolution bandwidth.