SemConfiguration

Provides methods to configure the Sem measurement.

class nirfmxwcdma.sem_configuration.SemConfiguration(signal_obj)[source]

Bases: object

Provides methods to configure the Sem measurement.

configure_averaging(selector_string, averaging_enabled, averaging_count, averaging_type)[source]

Configures averaging for the SEM measurement.

Parameters:

  • selector_string (string) – Pass an empty string. The signal name that is passed when creating the signal configuration is used.

  • averaging_enabled (enums.SemAveragingEnabled, int) –

    This parameter specifies whether to enable averaging of the spectrum for the measurement. The default value is False.

    Name (Value)

    Description

    False (0)

    The measurement is performed on a single acquisition.

    True (1)

    The measurement uses the Averaging Count parameter to calculate the number of acquisitions over which the spectrum is averaged.

  • averaging_count (int) – This parameter specifies the number of acquisitions used for averaging when you set the Averaging Enabled parameter to True. The default value is 10.

  • averaging_type (enums.SemAveragingType, int) –

    This parameter specifies the averaging type for averaging multiple spectrum acquisitions. The averaged spectrum is used for the measurement. The default value is RMS.

    Name (Value)

    Description

    RMS (0)

    The power spectrum is linearly averaged.

    Log (1)

    The power spectrum is averaged in a logarithmic scale.

    Scalar (2)

    The square root of the power spectrum is averaged.

    Max (3)

    The peak power in the spectrum at each frequency bin is retained from one record to the next.

    Min (4)

    The least power in the spectrum at each frequency bin is retained from one record to the next.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

configure_sweep_time(selector_string, sweep_time_auto, sweep_time_interval)[source]

Configures the sweep time interval.

Parameters:

  • selector_string (string) – Pass an empty string. The signal name that is passed when creating the signal configuration is used.

  • sweep_time_auto (enums.SemSweepTimeAuto, int) –

    This parameter specifies whether the measurement computes the sweep time. The default value is True.

    Name (Value)

    Description

    False (0)

    The measurement uses the sweep time that you specify in the Sweep Time Interval parameter.

    True (1)

    The measurement uses a sweep time value of one slot duration.

  • sweep_time_interval (float) – This parameter specifies the sweep time when you set the Sweep Time Auto parameter to False. This value is expressed in seconds. The default value is 666.66666700000007 microseconds.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

get_all_traces_enabled(selector_string)[source]

Gets whether to enable the traces to be stored and retrieved after performing the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is FALSE.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (bool):

Specifies whether to enable the traces to be stored and retrieved after performing the SEM measurement.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_amplitude_correction_type(selector_string)[source]

Gets whether the amplitude of the frequency bins, used in measurements, is corrected for external attenuation at the RF center frequency, or at the individual frequency bins. Use the RFmxInstr Configure External Attenuation method to configure the external attenuation table.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is RF Center Frequency.

Name (Value)

Description

RF Center Frequency (0)

All the frequency bins in the spectrum are compensated with a single external attenuation value that corresponds to the RF center frequency.

Spectrum Frequency Bin (1)

An individual frequency bin in the spectrum is compensated with the external attenuation value corresponding to that frequency.
Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (enums.SemAmplitudeCorrectionType):

Specifies whether the amplitude of the frequency bins, used in measurements, is corrected for external attenuation at the RF center frequency, or at the individual frequency bins. Use the RFmxInstr Configure External Attenuation method to configure the external attenuation table.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_averaging_count(selector_string)[source]

Gets the number of acquisitions used for averaging when you set the SEM_AVERAGING_ENABLED attribute to True.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 10.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (int):

Specifies the number of acquisitions used for averaging when you set the SEM_AVERAGING_ENABLED attribute to True.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_averaging_enabled(selector_string)[source]

Gets whether to enable averaging for the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is False.

Name (Value)

Description

False (0)

The measurement is performed on a single acquisition.

True (1)

The SEM measurement uses the value of the SEM Averaging Count attribute as the number of acquisitions over which the SEM measurement is averaged.
Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (enums.SemAveragingEnabled):

Specifies whether to enable averaging for the SEM measurement.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_averaging_type(selector_string)[source]

Gets the averaging type for averaging multiple spectrum acquisitions.

The averaged spectrum is used for the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is RMS.

Name (Value)

Description

RMS (0)

The power spectrum is linearly averaged. RMS averaging reduces signal fluctuations but not the noise floor.

Log (1)

The power spectrum is averaged in a logarithmic scale.

Scalar (2)

The square root of the power spectrum is averaged.

Max (3)

The peak power in the spectrum at each frequency bin is retained from one acquisition to the next.

Min (4)

The lowest power in the spectrum at each frequency bin is retained from one acquisition to the next.
Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (enums.SemAveragingType):

Specifies the averaging type for averaging multiple spectrum acquisitions.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_carrier_integration_bandwidth(selector_string)[source]

Gets the frequency range over which the measurement integrates the carrier power. This value is expressed in Hz.

Use “carrier<n>” as the selector string to read this attribute.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (float):

Returns the frequency range over which the measurement integrates the carrier power. This value is expressed in Hz.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_measurement_enabled(selector_string)[source]

Gets whether to enable the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is FALSE.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (bool):

Specifies whether to enable the SEM measurement.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_number_of_analysis_threads(selector_string)[source]

Gets the maximum number of threads used for parallelism for the SEM measurement.

The number of threads can range from 1 to the number of physical cores. The number of threads you set may not be used in calculations. The actual number of threads used depends on the problem size, system resources, data availability, and other considerations.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 1.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (int):

Specifies the maximum number of threads used for parallelism for the SEM measurement.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_number_of_offsets(selector_string)[source]

Gets the number of offset segments.

You do not need to use a selector string to read this result for default signal and result instance. Refer to the Selector String topic for information about the string syntax for named signals and results.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (int):

Returns the number of offset segments.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_offset_bandwidth_integral(selector_string)[source]

Gets the resolution of the spectrum to compare with spectral mask limits as an integer multiple of the RBW.

Use “offset<n>” as the selector string to read this attribute.

If this attribute returns a value greater than 1, the measurement acquires the spectrum with a narrow resolution and then processes it digitally to get a wider resolution that is equal to the product of the bandwidth integral and the RBW.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (int):

Returns the resolution of the spectrum to compare with spectral mask limits as an integer multiple of the RBW.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_offset_rbw_filter_bandwidth(selector_string)[source]

Gets the bandwidth of the RBW filter used to sweep the acquired offset segment. This value is expressed in Hz.

Use “offset<n>” as the selector string to read this attribute.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (float):

Returns the bandwidth of the RBW filter used to sweep the acquired offset segment. This value is expressed in Hz.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_offset_rbw_filter_type(selector_string)[source]

Gets the shape of the digital RBW filter.

Use “offset<n>” as the selector string to read this attribute.

Name (Value)

Description

FFT Based (0)

No RBW filtering is performed.

Gaussian (1)

The RBW filter has a Gaussian response.

Flat (2)

The RBW filter has a flat response.

Synch Tuned - 4 (3)

The RBW filter has a response of a 4-pole synchronously tuned filter.

Synch Tuned - 5 (4)

The RBW filter has a response of a 5-pole synchronously tuned filter.
Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (enums.SemOffsetRbwFilterType):

Returns the shape of the digital RBW filter.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_offset_start_frequency(selector_string)[source]

Gets the start frequency of the offset segment relative to the center frequency of the carrier(s). This value is expressed in Hz.

Use “offset<n>” as the selector string to read this attribute.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (float):

Returns the start frequency of the offset segment relative to the center frequency of the carrier(s). This value is expressed in Hz.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_offset_stop_frequency(selector_string)[source]

Gets the stop frequency of the offset segment relative to the center frequency of the carrier(s). This value is expressed in Hz.

Use “offset<n>” as the selector string to read this attribute.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (float):

Returns the stop frequency of the offset segment relative to the center frequency of the carrier(s). This value is expressed in Hz.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_sweep_time_auto(selector_string)[source]

Gets whether the measurement computes the sweep time.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is True.

Name (Value)

Description

False (0)

The measurement uses the sweep time that you specify in the SEM Sweep Time attribute.

True (1)

The measurement uses a sweep time value of one slot duration.
Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (enums.SemSweepTimeAuto):

Specifies whether the measurement computes the sweep time.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

get_sweep_time_interval(selector_string)[source]

Gets the sweep time when you set the SEM_SWEEP_TIME_AUTO attribute to False.

This value is expressed in seconds.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 666.66666700000007 microseconds.

Parameters:

selector_string (string) – Pass an empty string.

Returns:

attr_val (float):

Specifies the sweep time when you set the SEM_SWEEP_TIME_AUTO attribute to False.

error_code (int):

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

Tuple (attr_val, error_code)

set_all_traces_enabled(selector_string, value)[source]

Sets whether to enable the traces to be stored and retrieved after performing the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is FALSE.

Parameters:

  • selector_string (string) – Pass an empty string.

  • value (bool) – Specifies whether to enable the traces to be stored and retrieved after performing the SEM measurement.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_amplitude_correction_type(selector_string, value)[source]

Sets whether the amplitude of the frequency bins, used in measurements, is corrected for external attenuation at the RF center frequency, or at the individual frequency bins. Use the RFmxInstr Configure External Attenuation method to configure the external attenuation table.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is RF Center Frequency.

Name (Value)

Description

RF Center Frequency (0)

All the frequency bins in the spectrum are compensated with a single external attenuation value that corresponds to the RF center frequency.

Spectrum Frequency Bin (1)

An individual frequency bin in the spectrum is compensated with the external attenuation value corresponding to that frequency.
Parameters:

  • selector_string (string) – Pass an empty string.

  • value (enums.SemAmplitudeCorrectionType, int) –

    Specifies whether the amplitude of the frequency bins, used in measurements, is corrected for external attenuation at the RF center frequency, or at the individual frequency bins. Use the RFmxInstr Configure External Attenuation method to configure the external attenuation table.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_averaging_count(selector_string, value)[source]

Sets the number of acquisitions used for averaging when you set the SEM_AVERAGING_ENABLED attribute to True.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 10.

Parameters:

  • selector_string (string) – Pass an empty string.

  • value (int) – Specifies the number of acquisitions used for averaging when you set the SEM_AVERAGING_ENABLED attribute to True.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_averaging_enabled(selector_string, value)[source]

Sets whether to enable averaging for the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is False.

Name (Value)

Description

False (0)

The measurement is performed on a single acquisition.

True (1)

The SEM measurement uses the value of the SEM Averaging Count attribute as the number of acquisitions over which the SEM measurement is averaged.
Parameters:

  • selector_string (string) – Pass an empty string.

  • value (enums.SemAveragingEnabled, int) – Specifies whether to enable averaging for the SEM measurement.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_averaging_type(selector_string, value)[source]

Sets the averaging type for averaging multiple spectrum acquisitions.

The averaged spectrum is used for the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is RMS.

Name (Value)

Description

RMS (0)

The power spectrum is linearly averaged. RMS averaging reduces signal fluctuations but not the noise floor.

Log (1)

The power spectrum is averaged in a logarithmic scale.

Scalar (2)

The square root of the power spectrum is averaged.

Max (3)

The peak power in the spectrum at each frequency bin is retained from one acquisition to the next.

Min (4)

The lowest power in the spectrum at each frequency bin is retained from one acquisition to the next.
Parameters:

  • selector_string (string) – Pass an empty string.

  • value (enums.SemAveragingType, int) – Specifies the averaging type for averaging multiple spectrum acquisitions.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_measurement_enabled(selector_string, value)[source]

Sets whether to enable the SEM measurement.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is FALSE.

Parameters:

  • selector_string (string) – Pass an empty string.

  • value (bool) – Specifies whether to enable the SEM measurement.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_number_of_analysis_threads(selector_string, value)[source]

Sets the maximum number of threads used for parallelism for the SEM measurement.

The number of threads can range from 1 to the number of physical cores. The number of threads you set may not be used in calculations. The actual number of threads used depends on the problem size, system resources, data availability, and other considerations.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 1.

Parameters:

  • selector_string (string) – Pass an empty string.

  • value (int) – Specifies the maximum number of threads used for parallelism for the SEM measurement.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_sweep_time_auto(selector_string, value)[source]

Sets whether the measurement computes the sweep time.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is True.

Name (Value)

Description

False (0)

The measurement uses the sweep time that you specify in the SEM Sweep Time attribute.

True (1)

The measurement uses a sweep time value of one slot duration.
Parameters:

  • selector_string (string) – Pass an empty string.

  • value (enums.SemSweepTimeAuto, int) – Specifies whether the measurement computes the sweep time.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int

set_sweep_time_interval(selector_string, value)[source]

Sets the sweep time when you set the SEM_SWEEP_TIME_AUTO attribute to False.

This value is expressed in seconds.

You do not need to use a selector string to configure or read this attribute for the default signal instance. Refer to the Selector String topic for information about the string syntax for named signals.

The default value is 666.66666700000007 microseconds.

Parameters:

  • selector_string (string) – Pass an empty string.

  • value (float) – Specifies the sweep time when you set the SEM_SWEEP_TIME_AUTO attribute to False.

Returns:

Returns the status code of this method. The status code either indicates success or describes a warning condition.

Return type:

int