Rohde & Schwarz RTE - Page 489

Data and file management
R&S
®
RTE
489User Manual 1326.1032.02 ─ 20
Remote command:
EXPort:WAVeform:NAME on page 1402
EXPort:WAVeform:SAVE on page 1403
Interleaved x/y
Includes horizontal values in the export data (time or frequency values, depending on
the waveform). X and Y-values are written alternately to the file. If disabled, only Y-val-
ues - mostly voltage values - are written.
Interleaved x/y data cannot be exported as raw values, the "Raw (ADC direct)" option
is not available.
Remote command:
EXPort:WAVeform:INCXvalues on page 1406
Raw (ADC direct)
Enables the export of analog channel data in the raw sample format of the ADC. The
data format is integer 8 bit (signed 8-bit binary format). This format reduces the file size
(1 Byte/sample instead of 4 Bytes/sample in binary files) but decreases the precision of
the values.
If the high definition mode is active, the data format is integer 16 bit, except for peak
detect decimation (8 bit). See "Export" on page 192.
Only y-values are exported, the "Interleaved x/y" option is not available.
Currently, the setting is not available for the export of digital channel data and data of
R&S RT-ZVC channels.
Data conversion:
To convert INT8 or INT16 data to physical quantities, e.g. voltages, use the following
formulas:
ConversionFactor = VerticalScale * VerticalDivisionCount / NofQuantisationLevels
PhysicalQuantity = (Value_ADC * ConversionFactor) + VerticalOffset - (VerticalScale *
VerticalPosition)
The raw values are written in the *.Wfm.* file, all other values can be found in the
corresponding header file.
Table 12-2: Example of raw data conversion
INT8 INT16, HD mode
VerticalScale 110 mV/div 50 mV/div
VerticalPosition 1 div 0
VerticalOffset 50 mV 0
NofQuantisationLevels 253 253 * 256
VerticalDivisionCount 10 10
Value_ADC 13 -61
ConversionFactor 0.11 * 10 / 253 = 0.004347826086957 0.05 * 10 / (253 * 256) =
0.0000771986
Voltage (13 * 0.004347826086957) + 0.05 - (1 * 0.11) =
-0.003478260869559 V = 3.478260869559 mV
(-61 * 0.0000771986) + 0 =
-4.7091146 mV
Waveform data and results