• NIFGEN_ATTRIBUTE_OSP_ENABLED
• NIFGEN_ATTRIBUTE_OSP_IQ_RATE
• NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE
• NIFGEN_ATTRIBUTE_OSP_MODE
• NIFGEN_ATTRIBUTE_OSP_CARRIER_ENABLED
• NIFGEN_ATTRIBUTE_OSP_CARRIER_FREQUENCY
• NIFGEN_ATTRIBUTE_OSP_FREQUENCY_SHIFT
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_FLAT_PASSBAND
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_RAISED_COSINE_ALPHA
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_ROOT_RAISED_COSINE_ALPHA
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_GAUSSIAN_BT
• NIFGEN_ATTRIBUTE_OSP_CARRIER_PHASE_I
• NIFGEN_ATTRIBUTE_OSP_CARRIER_PHASE_Q
• NIFGEN_ATTRIBUTE_OSP_PRE_FILTER_GAIN_I
• NIFGEN_ATTRIBUTE_OSP_PRE_FILTER_GAIN_Q
• NIFGEN_ATTRIBUTE_OSP_PRE_FILTER_OFFSET_I
• NIFGEN_ATTRIBUTE_OSP_PRE_FILTER_OFFSET_Q
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_ENABLED
• NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_INTERPOLATION
• NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_ENABLED
• NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_GAIN
• NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_INTERPOLATION
• NIFGEN_ATTRIBUTE_OSP_COMPENSATE_FOR_FILTER_GROUP_DELAY
• NIFGEN_ATTRIBUTE_OSP_OVERFLOW_ERROR_REPORTING
• NIFGEN_ATTRIBUTE_OSP_OVERFLOW_STATUS

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150246	ViBoolean	R/W	N/A	None	None

Enables or disables the OSP block of the signal generator. When the OSP block is disabled, all OSP-related attributes are disabled and have no effect on the generated signal.

Defined Values

VI_TRUE	Enables the OSP block of the signal generator.
VI_FALSE	Disables the OSP block of the signal generator.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150248	ViReal64	R/W	N/A	None	None

Specifies the rate at which the user-provided waveform data is generated when the NIFGEN_ATTRIBUTE_OSP_ENABLED attribute is set to VI_TRUE.

NI-FGEN sets the NIFGEN_ATTRIBUTE_ARB_SAMPLE_RATE attribute of the signal generator to the product of the values of the NIFGEN_ATTRIBUTE_OSP_IQ_RATE, NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_INTERPOLATION, and NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_INTERPOLATION attributes. When the NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE attribute is set to NIFGEN_VAL_OSP_REAL, the NIFGEN_ATTRIBUTE_OSP_IQ_RATE attribute is the rate at which the signal generator processes real (I) data. When the NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE attribute is set to NIFGEN_VAL_OSP_COMPLEX, the NIFGEN_ATTRIBUTE_OSP_IQ_RATE is the rate at which the signal generator processes complex (I/Q) data.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150247	ViInt32	R/W	N/A	None	None

Specifies the way in which data is processed by the OSP block.

NIFGEN_VAL_OSP_REAL	The waveform data points are real numbers (I data).
NIFGEN_VAL_OSP_COMPLEX	The waveform data points are complex numbers (I/Q data).

Note:  When using the NI 5450/5451 with I/Q rates higher than 200 MS/s, NI-FGEN restricts this attribute value to NIFGEN_VAL_OSP_COMPLEX.

Numeric Value	Data Type	Access	Applies to	Coercion	High-Level Functions
1150370	ViInt32	R/W	N/A	None	None

Specifies the generation mode of the OSP, which determines the type of data contained in the output signal.

For more information about the OSP modes your device supports, refer to the Devices section of the NI Signal Generators Help.

Defined Values

NIFGEN_VAL_OSP_IF	The OSP block generates intermediate frequency (IF) data.
NIFGEN_VAL_OSP_BASEBAND	The OSP block generates baseband data.

Note:  When using the NI 5450/5451 with I/Q rates higher than 200 MS/s, NI-FGEN restricts this attribute value to NIFGEN_VAL_OSP_BASEBAND.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150249	ViBoolean	R/W	N/A	None	None

Enables or disables generation of the carrier.

Defined Values

VI_TRUE	Generation of the carrier is enabled.
VI_FALSE	Generation of the carrier is disabled.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150250	ViReal64	R/W	N/A	None	None

Specifies the frequency of the generated carrier.

Numeric Value	Data Type	Access	Applies to	Coercion	High-Level Functions
1150371	ViReal64	R/W	Channel	None	None

Specifies the amount of frequency shift applied to the baseband signal.

Note:  When using the NI 5450/5451 with I/Q rates higher than 200 MS/s, NI-FGEN restricts this attribute value to 0.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150253	ViInt32	R/W	N/A	None	None

Specifies the pulse-shaping filter type for the FIR filter.

Defined Values:

NIFGEN_VAL_OSP_FLAT	Applies a flat filter to the data with the passband value specified in the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_FLAT_PASSBAND attribute.
NIFGEN_VAL_OSP_RAISED_COSINE	Applies a raised cosine filter to the data with the alpha value specified in the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_RAISED_COSINE_ALPHA attribute.
NIFGEN_VAL_OSP_ROOT_RAISED_COSINE	Applies a root raised cosine filter to the data with the alpha value specified in the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_ROOT_RAISED_COSINE_ALPHA attribute.
NIFGEN_VAL_OSP_GAUSSIAN	Applies a Gaussian filter to the data with the BT value specified in the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_GAUSSIAN_BT attribute.
NIFGEN_VAL_OSP_CUSTOM	Applies a custom filter to the data. If NIFGEN_VAL_OSP_CUSTOM is selected, you must provide a set of FIR filter coefficients with the niFgen_ConfigureCustomFIRFilterCoefficients function.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150261	ViReal64	R/W	N/A	None	None

Specifies the passband value to use when calculating the FIR filter coefficients. The FIR filter is designed to be flat to passband x I/Q rate. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE attribute is set to NIFGEN_VAL_OSP_FLAT.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150260	ViReal64	R/W	N/A	None	None

Specifies the alpha value to use when calculating the pulse shaping FIR filter coefficients. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE attribute is set to NIFGEN_VAL_OSP_RAISED_COSINE.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150259	ViReal64	R/W	N/A	None	None

Specifies the alpha value to use when calculating the pulse-shaping FIR filter coefficients. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE attribute is set to NIFGEN_VAL_OSP_ROOT_RAISED_COSINE.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150262	ViReal64	R/W	N/A	None	None

Specifies the BT value to use when calculating the pulse-shaping FIR filter coefficients. The BT value is the product of the -3 dB bandwidth and the symbol period. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE attribute is set to NIFGEN_VAL_OSP_GAUSSIAN.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150251	ViReal64	R/W	N/A	None	None

Specifies the I carrier phase, in degrees, at the first point of the generated signal.

Default Value: 0.0

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150252	ViReal64	R/W	N/A	None	None

Specifies the Q carrier phase, in degrees, at the first point of the generated signal. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE attribute is set to NIFGEN_VAL_OSP_COMPLEX.

Default Value: -90.0

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150264	ViReal64	R/W	N/A	None	None

Specifies the digital gain to apply to the I data stream before any filtering by the OSP block.

Defined Values: -2.0 to 2.0

Default Value: 1.0

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150265	ViReal64	R/W	N/A	None	None

Specifies the digital gain to apply to the Q data stream before any filtering by the OSP block. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE attribute is set to NIFGEN_VAL_OSP_COMPLEX.

Defined Values: -2.0 to 2.0

Default Value: 1.0

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150266	ViReal64	R/W	N/A	None	None

Specifies the digital offset to apply to the I data stream. This offset is applied after the prefilter gain and before any filtering.

Defined Values: Range is from -1.0 to 1.0

Default Value: 0.9

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150267	ViReal64	R/W	N/A	None	None

Specifies the digital offset to apply to the Q data stream. This offset is applied after the prefilter gain and before any filtering. This attribute is used only when the NIFGEN_ATTRIBUTE_OSP_DATA_PROCESSING_MODE attribute is set to NIFGEN_VAL_OSP_COMPLEX.

Defined Values: Range is from -1.0 to 1.0

Default Value: 0.0

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150255	ViBoolean	R/W	N/A	None	None

Enables or disables the FIR filter.

Note:  You must set the NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_ENABLED and NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_ENABLED attributes to the same value.

Defined Values

VI_TRUE	The FIR filter is enabled.
VI_FALSE	The FIR filter is disabled.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150256	ViReal64	R/W	N/A	None	None

Specifies the interpolation factor for the FIR filter. If you do not set this value, NI-FGEN calculates the appropriate value based on the value of the NIFGEN_ATTRIBUTE_OSP_IQ_RATE attribute.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150257	ViBoolean	R/W	N/A	None	None

Enables or disables the CIC filter.

Note:  You must set the NIFGEN_ATTRIBUTE_OSP_CIC_FILTER_ENABLED and NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_ENABLED attributes to the same value.

Defined Values

VI_TRUE	Enables the CIC filter.
VI_FALSE	Disables the CIC filter.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150263	ViReal64	R/W	N/A	None	None

Specifies the gain applied at the final stage of the CIC filter. This attribute is commonly used to compensate for attenuation in the FIR filter. If you set the NIFGEN_ATTRIBUTE_OSP_FIR_FILTER_TYPE attribute to NIFGEN_VAL_OSP_CUSTOM, NI-FGEN calculates the CIC gain to achieve unity gain between the FIR and CIC filters. Setting this attribute overrides the value set by NI-FGEN.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150258	ViReal64	R/W	N/A	None	None

Specifies the interpolation factor for the CIC filter. If you do not set this value, NI-FGEN calculates the appropriate value based on the value of the NIFGEN_ATTRIBUTE_OSP_IQ_RATE attribute.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150389	ViBoolean	R/W	N/A	None	None

Adjusts for OSP filter group delay when aligning analog outputs and events in OSP mode. If this attribute is enabled, event outputs align more closely with the analog output. The analog output also aligns more closely between two devices synchronized using NI-TClk.

Note:  Group delay is the delay that occurs as a result of passing through a FIR filter. At a low I/Q rate, the group delay can become so large that some devices may not be able to align the events with the output. In this case, you must increase the I/Q rate or disable this attribute.

Defined Values

VI_TRUE	Compensation for the filter group delay is enabled.
VI_FALSE	Compensation for the filter group delay is disabled.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150268	ViInt32	R/W	N/A	None	None

Configures error reporting when the OSP block detects an overflow in any of its stages. Overflows lead to clipping of the waveform.

You can use the NIFGEN_ATTRIBUTE_OSP_OVERFLOW_STATUS attribute to query for overflow conditions regardless of the setting of the NIFGEN_ATTRIBUTE_OSP_OVERFLOW_ERROR_REPORTING attribute. The device continues to generate after an overflow, regardless of the value you select.

Defined Values

NIFGEN_VAL_ERROR_REPORTING_ERROR	NI-FGEN returns errors whenever an overflow has occurred in the OSP block.
NIFGEN_VAL_ERROR_REPORTING_DISABLED	NI-FGEN does not return errors when an overflow occurs in the OSP block.

Numeric Value	Data type	Access	Applies to	Coercion	High Level Functions
1150269	ViInt32	R/W	N/A	None	None

Returns a bit field of the overflow status in any stage of the OSP block. This attribute is functional regardless of the value for the NIFGEN_ATTRIBUTE_OSP_OVERFLOW_ERROR_REPORTING attribute.

Write 0 to this attribute to clear the current NIFGEN_ATTRIBUTE_OSP_OVERFLOW_ERROR_REPORTING value.

Defined Values

NIFGEN_VAL_OSP_OVERFLOW_NONE	None - 0x0
NIFGEN_VAL_OSP_OVERFLOW_PRE_FILTER_GAIN_I	Pre-filter gain I - 0x1
NIFGEN_VAL_OSP_OVERFLOW_PRE_FILTER_GAIN_Q	Pre-filter gain Q - 0x2
NIFGEN_VAL_OSP_OVERFLOW_PRE_FILTER_OFFSET_I	Pre-filter offset I - 0x4
NIFGEN_VAL_OSP_OVERFLOW_PRE_FILTER_OFFSET_Q	Pre-filter offset Q - 0x8
NIFGEN_VAL_OSP_OVERFLOW_FIR_FILTER_I	FIR filter I - 0x10
NIFGEN_VAL_OSP_OVERFLOW_FIR_FILTER_Q	FIR filter Q - 0x20
NIFGEN_VAL_OSP_OVERFLOW_CIC_FILTER_I	CIC filter I - 0x40
NIFGEN_VAL_OSP_OVERFLOW_CIC_FILTER_Q	CIC filter Q - 0x80
NIFGEN_VAL_OSP_OVERFLOW_COMPLEX_DATA	0x100