RFmxEVDO_SEMFetchLowerOffsetMargin
- Updated2024-10-14
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RFmxEVDO_SEMFetchLowerOffsetMargin
int32 __stdcall RFmxEVDO_SEMFetchLowerOffsetMargin (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, int32* measurementStatus, float64* margin, float64* marginFrequency, float64* marginAbsolutePower, float64* marginRelativePower);
Purpose
Returns the measurement status and margin from the limit line measured in the lower offset segment.
Use "offset<n>" as the selector string to read parameters from this function.
Parameters
| Input | ||
| Name | Type | Description |
| instrumentHandle | niRFmxInstrHandle | Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxEVDO_Initialize function. |
| selectorString | char[] | Specifies a selector string comprising of the signal name, result name, and offset number. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name, the default result instance is used. Examples: "offset0" "signal::sig1/offset0" "result::r1/offset0" "signal::sig1/result::r1/offset0" You can use the RFmxEVDO_BuildOffsetString function to build the selector string. |
| timeout | float64 | Specifies the timeout for fetching the specified measurement. This value is expressed in seconds. Set this value to an appropriate time, longer than expected for fetching the measurement. A value of -1 specifies that the function waits until the measurement is complete. |
| measurementStatus | int32* | Indicates the lower offset measurement status. |
| margin | float64* | Returns the margin. This value is expressed in dB. Margin is defined as the minimum distance between the spectrum and the limit mask. |
| marginFrequency | float64* | Returns the frequency at which the margin occurred in the lower (negative) offset. This value is expressed in Hz. |
| marginAbsolutePower | float64* | Returns the power at which the margin occurred in the lower (negative) offset segment. This value is expressed in dBm. |
| marginRelativePower | float64* | Returns the power at which the margin occurred in the lower (negative) offset segment relative to the integrated power of the reference carrier. This value is expressed in dB. |
Return Value
| Name | Type | Description | ||||||||
| status | int32 | Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. Examine the status code from each call to an RFmx function to determine if an error has occurred. To obtain a text description of the status code and additional information about the error condition, call the RFmxEVDO_GetError function. The general meaning of the status code is as follows:
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