Rohde & Schwarz RTP044 - Page 490

Data and file management
R&S
®
RTP
490User Manual 1337.9952.02 ─ 12
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
Remote command:
EXPort:WAVeform:RAW on page 1534
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 1533
Save to file
Enter the filename to save the waveform to. Double-tap the filename to open the file
selection dialog box.
By default, the filename has the prefix "RefCurves_". You can define a pattern for auto-
matic naming in the "Autonaming" dialog, see Chapter 4.8.1, "Autonaming",
on page 127.
"Save"
Saves the waveform as a reference waveform in the selected file.
"Save As..."
Opens the file selection dialog box and saves the waveform to the
selected file. See also Chapter 12.5, "File selection dialog",
on page 509
Save and recall waveform data and results