Rohde & Schwarz FSVA - Page 208

Instrument Functions
R&S
®
FSVA/FSV
208Operating Manual 1176.7510.02 ─ 09
Element Description
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 209). If the NumberOfChannels element is not defined, one channel
is assumed.
DataFilename Contains the filename of the I/Q data binary file that is part of the iq-tar file.
It is recommended that the filename uses the following convention:
<xyz>.<Format>.<Channels>ch.<Type>
●
<xyz> = a valid Windows file name
●
<Format> = complex, polar or real (see Format element)
●
<Channels> = Number of channels (see NumberOfChannels element)
●
<Type> = float32, float64, int8, int16, int32 or int64 (see DataType ele-
ment)
Examples:
●
xyz.complex.1ch.float32
●
xyz.polar.1ch.float64
●
xyz.real.1ch.int16
●
xyz.complex.16ch.int8
UserData Optional: contains user, application or device-specific XML data which is not
part of the iq-tar specification. This element can be used to store additional
information, e.g. the hardware configuration. It is recommended that you add
user data as XML content.
PreviewData Optional: contains further XML elements that provide a preview of the I/Q data.
The preview data is determined by the routine that saves an iq-tar file (e.g.
R&S FSVA/FSV). For the definition of this element refer to the RsIqTar.xsd
schema. Note that the preview can be only displayed by current web browsers
that have JavaScript enabled and if the XSLT stylesheet
open_IqTar_xml_file_in_web_browser.xslt is available.
Example: ScalingFactor
Data stored as int16 and a desired full scale voltage of 1 V
ScalingFactor = 1 V / maximum int16 value = 1 V / 2
15
= 3.0517578125e-5 V
Numerical value Numerical value x ScalingFac-
tor
Minimum (negative) int16 value
- 2
15
= - 32768
-1 V
Maximum (positive) int16 value
2
15
-1= 32767
0.999969482421875 V
Example: PreviewData in XML
<PreviewData>
<ArrayOfChannel length="1">
<Channel>
<PowerVsTime>
<Min>
<ArrayOfFloat length="256">
<float>-95</float>
<float>-94</float>
...
<float>-93</float>
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