Analog Modulation VI Attributes for IF/NI-SCOPE
Modulation VI attributes store information related to the downconversion process, carrier frequency, and VI references used by the processing VIs. Call MT Get Attributes to view all public attribute settings. Set read/write attributes by calling MT Set Attributes.
The following table describes carrier and receiver attributes.
Carrier Attributes |
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| Attribute Cluster Name | Access | Data Type | Default Value | Description |
|---|---|---|---|---|
| carrier.frequency | read-only | double |  |
Specifies the user-requested carrier frequency in Hz. This value may be coerced based on hardware settings and downconversion specifications. |
Receiver Attributes |
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| Attribute Cluster Name | Access | Data Type | Default Value | Description |
| receiver.handles. niScope handle |
read-only | niscope instrument handle | null handle | Specifies the NI-SCOPE instrument handle returned by the NI-SCOPE Initialize VI. |
| receiver. data format |
read-only | enum{real, complex modulated (array), complex modulated (interleaved)} |
real | Specifies the data format returned by the digitizer module. |
| receiver. auto suppress SW IQ |
read/write | enum{off, on} | off | Specifies whether to suppress the software I/Q processing when the digitizer module onboard digital downconverter (DDC) is used. When this attribute is set to ON and the DDC is used, the Convert IF to IQ VI does not apply any additional processing to the data returned from the niScope Read or niScope Fetch VIs. When the DDC is not used and/or this attribute is OFF, the Convert IF to IQ VI always applies a software filter to the data from the NI-SCOPE acquisition VI.
Refer to the NI RF Vector Signal Analyzers Help, available at Start»All Programs»National Instruments»NI-RFSA, for more information about DDC use. |
| receiver. bandwidth |
read-only | double | (unconfigured) |
Specifies the user-requested bandwidth. This value may be coerced based on hardware settings and downconversion specifications. |