More About Oscilloscope Commands
37
Keysight P9241/42/43A Oscilloscopes SCPI Programmer's Guide
1201
Duplicate Mnemonics
Identical function mnemonics can be used in more than one subsystem. For
example, the function mnemonic RANGe may be used to change the vertical range
or to change the horizontal range:
:CHANnel1:RANGe .4
Sets the vertical range of channel 1 to 0.4 volts full scale.
:TIMebase:RANGe 1
Sets the horizontal time base to 1 second full scale.
:CHANnel1 and :TIMebase are subsystem selectors and determine which range is
being modified.
Tree Traversal Rules and Multiple Commands
Command headers are created by traversing down the command tree. A legal
command header would be :TIMebase:RANGe. This is referred to as a
compound
header
. A compound header is a header made of two or more mnemonics
separated by colons. The mnemonic created contains no spaces.
The following rules apply to traversing the tree:
• A leading colon (<NL> or EOI true on the last byte) places the parser at the root
of the command tree. A leading colon is a colon that is the first character of a
program header. Executing a subsystem command lets you access that
subsystem until a leading colon or a program message terminator (<NL>) or
EOI true is found.
• In the command tree, use the last mnemonic in the compound header as the
reference point (for example, RANGe). Then find the last colon above that
mnemonic (TIMebase:). That is the point where the parser resides. Any
command below that point can be sent within the current program message
without sending the mnemonics which appear above them (for example,
POSition).
The output statements in the examples are written using the Keysight VISA COM
library in Visual Basic. The quoted string is placed on the bus, followed by a
carriage return and linefeed (CRLF).
To execute more than one function within the same subsystem, separate the
functions with a semicolon (;):
:<subsystem>:<function><separator><data>;<function><separator><data><ter
minator>
For example:
myScope.WriteString ":TIMebase:RANGe 0.5;POSition 0"
Содержание P9241
Страница 1: ...Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide...
Страница 6: ...6 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide...
Страница 36: ...36 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 1 What s New...
Страница 41: ...Setting Up 2 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 41...
Страница 44: ...44 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 2 Setting Up...
Страница 222: ...222 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 7 Root Commands...
Страница 244: ...244 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 8 ACQuire Commands...
Страница 256: ...256 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 9 CALibrate Commands...
Страница 278: ...278 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 10 CHANnel n Commands...
Страница 328: ...328 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 15 EXTernal Trigger Commands...
Страница 386: ...386 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 17 FUNCtion m Commands...
Страница 390: ...390 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 18 HCOPY Commands...
Страница 416: ...416 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 20 MARKer Commands...
Страница 498: ...498 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 21 MEASure Commands...
Страница 532: ...532 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 22 MTESt Commands...
Страница 572: ...572 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 24 SAVE Commands...
Страница 596: ...596 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 25 SBUS n Commands SBUS n A429 SOURce on page 588...
Страница 900: ...900 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 28 TIMebase Commands...
Страница 1080: ...1080 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 31 WGEN w Commands...
Страница 1142: ...1142 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 34 Error Messages...
Страница 1204: ...1204 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide 37 More About Oscilloscope Commands...
Страница 1344: ...1344 Keysight P9241 42 43A Oscilloscopes SCPI Programmer s Guide Index...