
More About Oscilloscope Commands
37
Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide
797
Query Return Values
Command headers immediately followed by a question mark (?) are
queries. Queries are used to get results of measurements made by the
instrument or to find out how the instrument is currently configured.
After receiving a query, the instrument interrogates the requested function
and places the answer in its output queue. The answer remains in the
output queue until it is read or another command is issued.
When read, the answer is transmitted across the bus to the designated
listener (typically a controller). For example, the query :TIMebase:RANGe?
places the current time base setting in the output queue. When using the
Agilent VISA COM library in Visual Basic, the controller statements:
Dim strQueryResult As String
myScope.WriteString ":TIMebase:RANGe?"
strQueryResult = myScope.ReadString
pass the value across the bus to the controller and place it in the variable
strQueryResult.
Infinity
Representation
The representation of infinity is +9.9E+37. This is also the value returned
when a measurement cannot be made.
N O T E
Read Query Results Before Sending Another Command. Sending another command or
query before reading the result of a query clears the output buffer (the current response)
and places a Query INTERRUPTED error in the error queue.
Содержание InfiniiVision 2000 X-Series
Страница 1: ...s1 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide...
Страница 24: ...24 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide...
Страница 38: ...38 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 1 What s New...
Страница 48: ...48 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 2 Setting Up...
Страница 62: ...62 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 3 Getting Started...
Страница 120: ...120 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 4 Commands Quick Reference...
Страница 206: ...206 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 8 BUS n Commands...
Страница 242: ...242 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 11 DEMO Commands...
Страница 250: ...250 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 12 DIGital d Commands...
Страница 270: ...270 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 14 DVM Commands...
Страница 276: ...276 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 15 EXTernal Trigger Commands...
Страница 312: ...312 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 17 HARDcopy Commands...
Страница 332: ...332 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 19 MARKer Commands...
Страница 416: ...416 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 22 POD Commands...
Страница 424: ...424 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 23 RECall Commands...
Страница 446: ...446 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 24 SAVE Commands...
Страница 588: ...588 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 28 TIMebase Commands...
Страница 692: ...692 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 31 WGEN Commands...
Страница 758: ...758 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 34 Error Messages...
Страница 788: ...788 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 36 Synchronizing Acquisitions...
Страница 918: ...918 Agilent InfiniiVision 2000 X Series Oscilloscopes Programmer s Guide 38 Programming Examples...