User Manual

232 Keysight InfiniiVision 1000 X-Series Oscilloscopes Programmer's Guide
12 :DISPlay Commands
:DISPlay:DATA
(see page 782)
Query Syntax
:DISPlay:DATA? [<format>][,][<palette>]
<format> ::= {BMP | BMP8bit | PNG}
<palette> ::= {COLor | GRAYscale}
The :DISPlay:DATA? query reads screen image data. You can choose 24-bit BMP,
8-bit BMP8bit, or 24-bit PNG formats in color or grayscale.
If no format or palette option is specified, the screen image is returned in BMP,
COLor format.
Screen image data is returned in the IEEE-488.2 # binary block data format.
Return Format
<display data><NL>
<display data> ::= binary block data in IEEE-488.2 # format.
See Also • "Introduction to :DISPlay Commands" on page 226
• ":HARDcopy:INKSaver" on page 315
• ":PRINt" on page 157
• "*RCL (Recall)" on page 120
• "*SAV (Save)" on page 124
• ":VIEW" on page 164
Example Code
' IMAGE_TRANSFER - In this example, we will query for the image data
' with ":DISPlay:DATA?", read the data, and then save it to a file.
Dim byteData() As Byte
myScope.IO.Timeout = 15000
myScope.WriteString ":DISPlay:DATA? BMP, COLOR"
byteData = myScope.ReadIEEEBlock(BinaryType_UI1)
' Output display data to a file:
strPath = "c:\scope\data\screen.bmp"
' Remove file if it exists.
If Len(Dir(strPath)) Then
Kill strPath
End If
Close #1 ' If #1 is open, close it.
Open strPath For Binary Access Write Lock Write As #1 ' Open file f
or output.
Put #1, , byteData ' Write data.
Close #1 ' Close file.
myScope.IO.Timeout = 5000
See complete example programs at: Chapter 36, “Programming Examples,”
starting on page 791