Agilent-technologies Signal Analyzer N9030a Manual de usuario descargar pdf (Pagina 118)

3 Programming the Analyzer

Remote Measurement Functions

Option Description

MEAN

("Note 1" on

page 120)

Returns a single value that is the arithmetic mean of the data point values (indB/dBm) for the

specified region(s) of trace data. For I/Q trace data, the mean of the magnitudes of the I/Q pairs is

returned. See the following equations.

If the original trace data is indB, this function returns the arithmetic mean of

those log values, not log of the mean power which is a more useful value. The

mean of the log is the better measurement technique when measuring CW

signals in the presence of noise. The mean of the power, expressed indB, is

useful in power measurements such as Channel Power. To achieve the mean of

the power, use the RMS option.

Equation 1: Mean Value of Data Points for Specified Region(s)

where Xi is a data point value, and n is the number of data points in the specified region(s).

Equation 2:Mean Value of I/Q Data Pairs for Specified Region(s)

where |Xi| is the magnitude of an I/Q pair, and n is the number of I/Q pairs in the specified region(s).

DMEan

("Note 1" on

page 120)

Returns a single value that is the mean power (indB/dBm) of the data point values for the specified

region(s) of trace data. See the following equation:

Equation 3: DMEan Value of Data Points for Specified Region(s)

RMS

("Note 1" on

page 120)

Returns a single value that is the average power on a root-mean-squared voltage scale (arithmetic

rms) of the data point values for the specified region(s) of trace data. See the following equation.

For I/Q trace data, the rms of the magnitudes of the I/Q pairs is returned. See

the following equation.

This function is very useful for I/Q trace data. However, if the original trace data

is in dB, this function returns the rms of the log values which is not usually

needed.

118 Remote Language Compatibility Measurement Application Reference

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Agilent-technologies Signal Analyzer N9030a Manual de usuario Pagina 118