Agilent Technologies 42D Uživatelská příručka Strana 64
- Strana / 110
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
5-16
Programming and Documentation Conventions
Infinity Representation
Infinity Representation
The representation of infinity is 9.9E+37. This is also the value returned when
a measurement cannot be made.
Sequential and Overlapped Commands
IEEE 488.2 distinguishes between sequential and overlapped commands.
Sequential commands finish their task before the execution of the next
command starts. Overlapped commands run concurrently. Commands following
an overlapped command may be started before the overlapped command is
completed. All of the commands are sequential.
Response Generation
As defined by IEEE 488.2, query responses may be buffered for the following
conditions:
• When the query is parsed by the instrument.
• When the controller addresses the instrument to talk so that it may read the
response.
The responses to a query are buffered when the query is parsed.
- Oscilloscopes and 1
- Agilent 54621D/22D/41D/42D 1
- Mixed-Signal Oscilloscopes 1
- Programming the Oscilloscope 2
- Capture 3
- Analyze 3
- In This Book 4
- Contents 5
- 6 Status Reporting 6
- Introduction to Programming 7
- Talking to the Instrument 9
- Program Message Syntax 10
- Duplicate Mnemonics 14
- Query Command 15
- Program Header Options 16
- Program Data Syntax Rules 17
- Program Message Terminator 19
- Programming Getting Started 21
- Initialization 23
- Autoscale 24
- Setting Up the Instrument 25
- Example Program 26
- Using the DIGitize Command 27
- String Variables 30
- Numeric Variables 31
- Multiple Queries 33
- Instrument Status 33
- Programming over GPIB 35
- Interface Capabilities 37
- Command and Data Concepts 37
- Addressing 38
- Communicating Over the Bus 39
- Bus Commands 40
- Programming over RS-232-C 41
- Interface Operation 43
- Configuring the Interface 46
- Lockout Command 48
- Conventions 49
- Command Set Organization 51
- Table 5-1 52
- Alphabetic Command Reference 52
- The Command Tree 54
- Truncation Rules 63
- Infinity Representation 64
- Response Generation 64
- Program Examples 66
- Status Reporting 67
- Figure 6-1 69
- Figure 6-2 72
- Figure 6-2 (continued) 73
- Status Byte Register (SBR) 74
- Trigger Event Register (TRG) 76
- Arm Event Register (ARM) 79
- Error Queue 80
- Output Queue 81
- Message Queue 81
- Clearing Registers and Queues 82
- Figure 6-3 82
- Reference 83
- <drive>:\setup.exe 85
- To start the help file 87
- Introduction 90
- Suffix Multipliers 91
- Programmer’s Quick Reference 100
- Commands and Queries 100
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