Rohde & Schwarz ESRP Series, User Manual

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Data Management and Documentation
R&S
®
ESRP
511 User Manual 1175.7445.02 ─ 08
<PreviewData>...</PreviewData>
</RS_IQ_TAR_FileFormat>
Element Description
RS_IQ_TAR_FileFormat The root element of the XML file. It must contain the attribute
fileFormatVersion
that contains the number of the file format definition.
Currently,
fileFormatVersion
"2" is used.
Name Optional: describes the device or application that created the file.
Comment Optional: contains text that further describes the contents of the file.
DateTime Contains the date and time of the creation of the file. Its type is
xs:dateTime
(see
RsIqTar.xsd
).
Samples Contains the number of samples of the I/Q data. For multi-channel signals all
channels have the same number of samples. One sample can be:
●
A complex number represented as a pair of I and Q values
●
A complex number represented as a pair of magnitude and phase values
●
A real number represented as a single real value
See also
Format
element.
Clock Contains the clock frequency in Hz, i.e. the sample rate of the I/Q data. A signal
generator typically outputs the I/Q data at a rate that equals the clock frequency.
If the I/Q data was captured with a signal analyzer, the signal analyzer used the
clock frequency as the sample rate. The attribute
unit
must be set to "Hz".
Format Specifies how the binary data is saved in the I/Q data binary file (see
DataFilename
element). Every sample must be in the same format. The for-
mat can be one of the following:
●
Complex: Complex number in cartesian format, i.e. I and Q values inter-
leaved. I and Q are unitless
●
Real: Real number (unitless)
●
Polar: Complex number in polar format, i.e. magnitude (unitless) and phase
(rad) values interleaved. Requires
DataType
=
float32
or
float64
DataType Specifies the binary format used for samples in the I/Q data binary file (see
DataFilename element and "I/Q Data Binary File" on page 513). The follow-
ing data types are allowed:
●
int8: 8 bit signed integer data
●
int16: 16 bit signed integer data
●
int32: 32 bit signed integer data
●
float32: 32 bit floating point data (IEEE 754)
●
float64: 64 bit floating point data (IEEE 754)
ScalingFactor Optional: describes how the binary data can be transformed into values in the
unit Volt. The binary I/Q data itself has no unit. To get an I/Q sample in the unit
Volt the saved samples have to be multiplied by the value of the
ScalingFactor
. For polar data only the magnitude value has to be multiplied.
For multi-channel signals the
ScalingFactor
must be applied to all channels.
The
ScalingFactor
must be > 0. If the
ScalingFactor
element is not
defined, a value of 1 V is assumed.
NumberOfChannels Optional: specifies the number of channels, e.g. of a MIMO signal, contained in
the I/Q data binary file. For multi-channels, the I/Q samples of the channels are
expected to be interleaved within the I/Q data file (see
"I/Q Data Binary File"
on page 513). If the
NumberOfChannels
element is not defined, one channel
is assumed.
Saving and Recalling Settings Files – SAVE/RCL Key