Features Available With Power Spectrum Measurements

Power Spectrum measurements support:

• Full-band stepped spectrum measurements

• Digital Image Protection

• Noise Correction

• Sequenced acquisition multi-measurements

• Various detectors (and multiple simultaneous detectors)

• Trace averaging

• IF dithering (for enhanced spur rejection)

• Digital image rejection, and noise corrections

• List Mode

• Frequency count and band power marker calculations

• Flat Top and Gaussian window types

• Triggering

• Time selective (gated) frequency domain measurements

• Multiband Measurements

 

The following are not available with Power Spectrum measurements:

• Phase information (the nature of "stitching" together FFTs provides scalar data only)

• Time Data Displays

• Time averaging

• Traditional averaging...only Trace Averaging is supported

• Shared acquisition multi-measurements

• Auto ranging

• Data recording and playback

• ADS integration

• Demodulation of the input signal

• Window types other than Flat Top and Gaussian

The following tables compare Power Spectrum measurements with other 89600 VSA measurements.

Available Features

Feature	Power Spectrum	Other Measurements
Analog Demodulation	no	yes
Digital Demodulation	no	yes (optional)
Phase information	no	yes
Time data	no	yes
Gating	yes	yes
Time capture	no	yes
Very narrow RBWs	yes	no
Wide frequency spans	yes	no
Integrated source link	no	yes
EEsof/ADS dynamic link	no	yes (optional)

Available Measurement Data

For detailed information on any of these data types, see Available Trace Data.

Measurement Data †	Power Spectrum	Other Measurements
Spectrum	yes	yes
Math Functions	yes	yes
Data Registers	yes	yes
PSD Power Spectral Density: See power spectral density.	no	yes
Instantaneous Spectrum	no	yes
Time	no	yes
Gated Time	no	yes
Auto Correlation	no	yes
CCDF Complementary Cumulative Distribution Function	no	yes
CDF Cumulative Distribution Function: The cumulative probability that a parameter will be less than a given value X.	no	yes
PDF 1) Probability Density Function Trace Data, or 2) Portable Document Format (PDF) created by Adobe Systems is an open standard for document exchange.	no	yes
Frequency Response	no	yes ††
Coherence	no	yes ††
Cross Correlation	no	yes ††
Cross Spectrum	no	yes ††
Impulse Response	no	yes ††

† Does not include measurement data for the "Optional Measurement Software" applications

†† This is a two-channel measurement and requires two input channels.

Available Trigger Types

For detailed information about these trigger types, see Trigger Types.

Trigger Types †	Power Spectrum	Other Measurements
Free Run	yes	yes
Channel 1 or 2	no	yes
IF Channel 1 or 2	no	yes
External	yes	yes
RF Radio Frequency: A generic term for radio-based technologies, operating between the Low Frequency range (30k Hz) and the Extra High Frequency range (300 GHz). Burst	yes	no
PXI	yes	no

† Available trigger types may vary depending on hardware.

Available Average Types

For detailed information about these average types, see Selecting an Average Type.

Average Types	Power Spectrum†	Other Measurements
rms	no	yes
rms Exponential	no	yes
Time	no	yes
Time Exponential	no	yes
Continuous peak hold	no	yes

† Trace averaging is available in all measurements (including Power Spectrum) for many result types .

Available Data Sources

Data Source	Power Spectrum	Other Measurements
From hardware	yes	yes
From a file (record and playback)	no	yes
From ADS interface	no	yes