Returns an array of measurement statuses, margins, frequencies at margins, and absolute and relative powers at margins for lower offset segments. The relative power is relative to the total aggregated power.
Use "subblock<n>" as the selector string to read results from this function.

Syntax

int32 __stdcall RFmxLTE_SEMFetchLowerOffsetMarginArray(niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, int32 measurementStatus[], float64 margin[], float64 marginFrequency[], float64 marginAbsolutePower[], float64 marginRelativePower[], int32 arraySize, int32 *actualArraySize)

Remarks

Refer to the LTE Spectral Emission Mask SEM and LTE Downlink Spectral Emission Mask SEM topics for more information.

Parameters

NameDirectionTypeDescription
instrumentHandle[in]niRFmxInstrHandle

This parameter specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr_Initialize function.

selectorString[in]char

This parameter specifies a Selector String comprising of the signal name, result name, and subblock 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. The default value is "subblock0".
Example:
"subblock0"
"signal::sig1/subblock0"
"result::r1/subblock0"
"signal::sig1/result::r1/subblock0"
You can use the RFmxLTE_BuildSubblockString function to build the selector string.

timeout[in]float64

This parameter 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. The default value is 10.

measurementStatus[out]int32

This parameter returns the array of the measurement status indicating whether the power before and after the burst is within the standard defined limit.

Name

Value

Description

RFMXLTE_VAL_SEM_LOWER_OFFSET_MEASUREMENT_STATUS_FAIL

0 (0x0)

Indicates that the measurement has failed.

RFMXLTE_VAL_SEM_LOWER_OFFSET_MEASUREMENT_STATUS_PASS

1 (0x1)

Indicates that the measurement has passed.

margin[out]float64

This parameter returns the array of margins from the standard-defined absolute limit mask for the lower (negative) offset. Margin is defined as the minimum difference between the spectrum and the limit mask. For the intra-band noncontiguous type of carrier aggregation, the offset segment may be truncated or discarded based on offset overlap rules as defined in the 3GPP TS 36.521 specification. If the offset segment is truncated, the SEM results lower offset start frequency and SEM results lower offset stop frequency are updated, and the measurement is performed on the updated offset segment. If the offset segment is discarded, a NaN is returned.

marginFrequency[out]float64

This parameter returns the array of frequency at which the margin occurs in the lower (negative) offset. For the intra-band noncontiguous type of carrier aggregation, the offset segment may be truncated or discarded based on offset overlap rules as defined in the 3GPP TS 36.521 specification. If the offset segment is truncated, the SEM results lower offset start frequency and SEM results lower offset stop frequency are updated, and the measurement is performed on the updated offset segment. If the offset segment is discarded, a NaN is returned.

marginAbsolutePower[out]float64

This parameter returns the array of power at which the margin occurs in the upper (positive) offset segment. For the intra-band noncontiguous type of carrier aggregation, the offset segment may be truncated or discarded based on offset overlap rules as defined in the 3GPP TS 36.521 specification. If the offset segment is truncated, the SEM results lower offset start frequency and SEM results lower offset stop frequency are updated, and the measurement is performed on the updated offset segment. If the offset segment is discarded, a NaN is returned.

marginRelativePower[out]float64

This parameter returns the array of powers at which the margin occurs in the upper (positive) offset segment relative to the value returned by the RFMXLTE_ATTR_SEM_RESULTS_TOTAL_AGGREGATED_POWER attribute. For the intra-band noncontiguous type of carrier aggregation, the offset segment may be truncated or discarded based on offset overlap rules as defined in the 3GPP TS 36.521 specification. If the offset segment is truncated the measurement is performed on the updated offset segment. If the offset segment is discarded, a NaN is returned.

arraySize[in]int32

Specifies the size of the array. Set the arraySize parameter to 0 to get the size of all the arrays in the actualArraySize parameter.

actualArraySize[out]int32 *

Returns the actual size of the array, if you pass NULL to all output array parameters, and set the arraySize parameter to 0.

Returns

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 RFmxLTE_GetError function.

The general meaning of the status code is as follows:

Value

Meaning

0

Success

Positive Values

Warnings

Negative Values

Errors