R&S FSL TRACe Subsystem
1300.2519.12 6.273 E-11
T
RACe<1|2>:IQ:AVERage:COUNt
This command defines the number of I/Q data sets that are to serve as a basis for averaging.
Parameter
0 to 32767
Example
TRAC:IQ ON
Switches on acquisition of I/Q data.
TRAC:IQ:AVER ON
Enables averaging of the I/Q measurement data
TRAC:IQ:AVER:COUN 10
Selects averaging over 10 data sets
TRAC:IQ:DATA?
Starts the measurement and reads out the averaged data.
Characteristics
*RST value: 0
SCPI: conform
Mode
A-T
TRACe<1|2>:IQ:DATA?
This command starts a measurement with the settings defined via TRACe<1|2>:IQ:SET and
returns the list of measurement results immediately after they are corrected in terms of
frequency response. The number of measurement results depends on the settings defined with
TRACe<1|2>:IQ:SET, the output format depends on the settings of the FORMat subsystem.
Note: The command requires that all response data are read out completely before the
instrument accepts further commands.
Return values
The result values are scaled linear in unit Volt and correspond to the voltage at the RF input of
the instrument. In ASCII format, the number of the returned values is 2 * the number of samples.
The first set contains the I–data, the second the Q–data.
Note: If the sampling rate exceeds 512k (
524288), the data are output in 512k blocks.
In binary format, the number of I– and Q–data can be calculated as follows:
8
DataBytesof#
DataQof#DataIof# ==
The offset of Q–data in the output buffer can be calculated as follows:
scatorDigitLengthIndi
DataBytesof
OffsetDataQ +=
)(#
with LengthIndicatorDigits being the number of digits of the length indicator including the #. In
the example above (#41024...) this results in a value of 6 for LengthIndicatorDigits and the
offset for the Q–data will result in 512 + 6 = 518.
For further details on formats refer to "Formats for returned values: ASCII format and binary
format" on page 6.300.
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