Agilent Technologies InfiniiVision 3000 DSO-X 3054A Servisní příručka stáhnout pdf (Strana 258)

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258 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide

13 :DISPlay Commands

:DISPlay:DATA

(see page 860)

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> ::= binary block data in IEEE-488.2 # format.

See Also • "Introduction to :DISPlay Commands" on page 255

• ":HARDcopy:INKSaver" on page 293

• ":PRINt" on page 179

• "*RCL (Recall)" on page 139

• "*SAV (Save)" on page 143

• ":VIEW" on page 186

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 37, “Programming Examples,”

starting on page 869

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