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Phase Noise Impairment

Applies to N5186A only.

Overview

The Phase Noise Impairment tab has:

• a read-only view that shows what is currently applied to the hardware.

• an editor that defines the desired phase noise profile.

The phase noise profile is defined by either using a power spectral density data points (Hz, dBc/Hz) or by directly providing the polynomial coefficients of the filter function .

If the desired phase noise is defined using power spectral density data points, a polynomial interpolation runs in the background to calculate the polynomial coefficients of the filter function that best fits within the target data boundaries and error tolerance.

GUI/SCPI Descriptions

P/N Impairment On

Phase Noise Editor - Profile Type

Phase Noise Editor - Desired Numerator

Phase Noise Editor - Desired Denominator

Phase Noise Editor - Desired Power List

Phase Noise Editor - Desired Frequency List

Phase Noise Editor - Desired Max Error

Phase Noise Editor - Apply

Phase Noise Editor - Abort Interpolation

Interpolation Running

Current Numerator List

Current Denominator List

Current Power List

Current Frequency List

Current Error List

P/N Impairment On

Enables or disables the Phase Noise Impairments.

Phase Noise Editor - Profile Type

Sets the profile type used to define the phase noise impairments.

Phase Noise Editor - Desired Numerator

Sets the n-th order numerator coefficient of the desired phase noise filter function.

The filter function is:

SCPI Command	[:SOURce]:IQOut<channel>:PHASe:NOISe:NUMerator<n> <real> [:SOURce]:IQOut<channel>:PHASe:NOISe:NUMerator<n>?
SCPI Example	IQO:PHAS:NOIS:NUM1 <data> IQO:PHAS:NOIS:NUM1?
Notes	<n> is the order of the polynomial term .
Min	-1
Max	1
Resolution	1e-9
State Saved	Yes

Phase Noise Editor - Desired Denominator

Sets the n-th order denominator coefficient of the desired phase noise filter function.

The filter function is:

SCPI Command	[:SOURce]:IQOut<channel>:PHASe:NOISe:DENominator<n> <real> [:SOURce]:IQOut<channel>:PHASe:NOISe:DENominator<n>?
SCPI Example	IQO:PHAS:NOIS:DEN1 <data> IQO:PHAS:NOIS:DEN1?
Notes	<n> is the order of the polynomial term. .
Min	-2
Max	2
Resolution	1e-9
State Saved	Yes

Phase Noise Editor - Desired Power List

Sets the phase noise power list (dBc/Hz) of the desired power spectral density profile used to generate the phase noise impairments filter.

Phase Noise Editor - Desired Frequency List

Sets the frequency list (Hz) of the desired power spectral density profile used to generate the phase noise impairments filter.

Phase Noise Editor - Desired Max Error

Sets the maximum acceptable error (dB) for the polynomial interpolation of the phase noise impairments filter function.

Phase Noise Editor - Apply

Applies the desired phase noise impairments profile.

• If the phase noise profile type is Polynomial, it applies the desired filter coefficients.

• If the phase noise profile type is Data Points, it calculates and applies the filter function that best fit the desired power spectral density profile defined.

Phase Noise Editor - Abort Interpolation

Aborts the polynomial interpolation in progress.

Interpolation Running

Returns 1 if polynomial interpolation is currently in progress otherwise 0.

Current Numerator List

This query returns the actual numerator coefficients list of the phase noise impairments filter function in use.

Current Denominator List

This query returns the actual denominator coefficients list of the phase noise impairments filter function in use.

Current Power List

This query returns the actual phase noise power list (dBc/Hz) of the power spectral density profile used to generate the phase noise impairments filter function in use.

Current Frequency List

This query returns the actual phase noise frequency list (Hz) of the power spectral density profile used to generate the phase noise impairments filter function in use.

Current Error List

This query returns the error list of the power spectral density profile relative to the phase noise impairments filter function in use.