Getting Started
3
Keysight InfiniiVision M9241/42/43A PXIe Oscilloscopes SCPI Programmer's Guide
63
The "8" states the number of digits that follow, and "00001000" states the number
of bytes to be transmitted.
The VISA COM library's ReadIEEEBlock and WriteIEEEBlock methods understand
the definite-length block syntax, so you can simply use variables that contain the
data:
' Read oscilloscope setup using ":SYSTem:SETup?" query.
myScope.WriteString ":SYSTem:SETup?"
Dim varQueryResult As Variant
varQueryResult = myScope.ReadIEEEBlock(BinaryType_UI1)
' Write learn string back to oscilloscope using ":SYSTem:SETup" command:
myScope.WriteIEEEBlock ":SYSTem:SETup ", varQueryResult
Sending Multiple Queries and Reading Results
You can send multiple queries to the instrument within a single command string,
but you must also read them back as a single query result. This can be
accomplished by reading them back into a single string variable, multiple string
variables, or multiple numeric variables.
For example, to read the :TIMebase:RANGe?;DELay? query result into a single
string variable, you could use the commands:
myScope.WriteString ":TIMebase:RANGe?;DELay?"
Dim strQueryResult As String
strQueryResult = myScope.ReadString
MsgBox "Timebase range; delay:" + strQueryResult
When you read the result of multiple queries into a single string variable, each
response is separated by a semicolon. For example, the output of the previous
example would be:
Timebase range; delay: <range_value>;<delay_value>
To read the :TIMebase:RANGe?;DELay? query result into multiple string variables,
you could use the ReadList method to read the query results into a string array
variable using the commands:
myScope.WriteString ":TIMebase:RANGe?;DELay?"
Dim strResults() As String
strResults() = myScope.ReadList(ASCIIType_BSTR)
MsgBox "Timebase range: " + strResults(0) + ", delay: " + strResults(1)
Figure 1
Definite-length block response data
#800001000<1000 bytes of data><terminator>
Actual Data
Number of Bytes
to be Transmitted
Number of Digits
That Follow
Содержание InfiniiVision M9241A
Страница 1: ...Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide ...
Страница 52: ...52 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 2 Setting Up ...
Страница 178: ...178 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 5 Commands Quick Reference ...
Страница 246: ...246 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 7 Root Commands ...
Страница 268: ...268 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 8 ACQuire Commands ...
Страница 280: ...280 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 9 CALibrate Commands ...
Страница 354: ...354 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 15 EXTernal Trigger Commands ...
Страница 412: ...412 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 17 FUNCtion m Commands ...
Страница 416: ...416 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 18 HCOPY Commands ...
Страница 442: ...442 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 20 MARKer Commands ...
Страница 588: ...588 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 23 MTESt Commands ...
Страница 692: ...692 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 24 POWer Commands ...
Страница 1062: ...1062 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 30 TIMebase Commands ...
Страница 1250: ...1250 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 33 WGEN w Commands ...
Страница 1306: ...1306 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 35 Obsolete and Discontinued Commands ...
Страница 1314: ...1314 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 36 Error Messages ...
Страница 1376: ...1376 Keysight InfiniiVision M9241 42 43A PXIe Oscilloscopes SCPI Programmer s Guide 39 More About Oscilloscope Commands ...