Fetches the origin offset and gain imbalance measurement results for GSM/EDGE/EGPRS.

Syntax

Namespace: NationalInstruments.RFmx.GsmMX

public int FetchIQImpairments(string selectorString, double timeout, out double meanIQGainImbalance, out double maximumIQGainImbalance, out double meanIQOriginOffset, out double maximumIQOriginOffset)

Parameters

NameTypeDescription
selectorStringstring

Specifies a selector string comprising of the result name. If you do not specify the result name, the default result instance is used. The default is "" (empty string).
Example:
""
"result::r1"
You can use the BuildResultString(string) method to build the selector string.

timeoutdouble

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 method waits until the measurement is complete.

meanIQGainImbalanceout double

Upon return, contains the mean of I/Q gain imbalance values over all the measured time slots. This value is expressed in dB. The presence of quadrature skew in the signal affects the measurement of I/Q gain imbalance.

maximumIQGainImbalanceout double

Upon return, contains the maximum of I/Q gain imbalance values over all the measured time slots. This value is expressed in dB. The presence of quadrature skew in the signal affects the measurement of I/Q gain imbalance.

meanIQOriginOffsetout double

Upon return, contains the mean of I/Q origin offset values over all the measured time slots. This value is expressed in dB. Presence of I/Q gain imbalance in the signal affects the I/Q origin offset measurement. The measurement returns this result for GSM/EDGE/EGPRS.

maximumIQOriginOffsetout double

Upon return, contains the maximum of I/Q origin offset values over all the measured time slots. This value is expressed in dB. Presence of I/Q gain imbalance in the signal affects the I/Q origin offset measurement. The measurement returns this result for GSM/EDGE/EGPRS.

Returns

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