Agilent Technologies 54645A Manuál s instrukcemi Strana 50
- Strana / 111
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Data Bits
Data bits are the number of bits sent and received per character that
represent the binary code of that character.
Information is stored in bytes (8 bits at a time) in the oscilloscope. Data can
be sent and received just as it is stored, without the need to convert the data.
Communicating Over the RS-232-C Bus
Each RS-232-C interface card has its own interface select code. This code is
used by the controller to direct commands and communications to the proper
interface. Unlike HP-IB, which allows multiple devices to be connected
through a single interface card, RS-232-C is only connected between two
devices at a time through the same interface card. Because of this, only the
interface code is required for the device address.
Generally, the interface select code can be any decimal value between 0 and
31, except for those interface codes which are reserved by the controller for
internal peripherals and other internal interfaces. This value can be selected
through switches on the interface card. For more information, refer to the
reference manual for your interface card or controller.
For example, if your RS-232-C interface select code is 20, the device address
required to communicate over the RS-232-C bus is 20.
Programming over RS-232-C
Communicating Over the RS-232-C Bus
4-9
- HP 54645A Oscilloscope and 2
- HP 54645D Mixed-Signal 2
- Oscilloscope 2
- Programming the Oscilloscope 3
- In This Book 5
- Contents 8
- 4 Programming over RS-232-C 9
- 6 Status Reporting 9
- Introduction 8–2 10
- Contents–4 11
- Introduction to Programming 12
- Talking to the Instrument 14
- Program Message Syntax 15
- Duplicate Mnemonics 18
- Query Command 19
- Program Header Options 20
- Program Data Syntax Rules 21
- Program Message Terminator 23
- Selecting Multiple Subsystems 23
- Programming Getting Started 24
- Initialization 26
- Autoscale 27
- Setting Up the Instrument 27
- Example Program 28
- Using the DIGitize Command 29
- String Variables 32
- Numeric Variables 33
- Multiple Queries 35
- Instrument Status 35
- Programming over HP-IB 36
- Interface Capabilities 38
- Command and Data Concepts 38
- Addressing 39
- Communicating Over the Bus 40
- Bus Commands 41
- Programming over RS-232-C 42
- Interface Operation 44
- Configuring the Interface 48
- Lockout Command 51
- Programming and Documentation 52
- Conventions 52
- Command Set Organization 54
- Table 5-1 55
- Alphabetic Command Reference 55
- The Command Tree 57
- Truncation Rules 61
- Infinity Representation 62
- Response Generation 62
- Program Examples 64
- Status Reporting 66
- Figure 6-1 68
- Figure 6-2 71
- Figure 6-2 (Continued) 72
- Status Byte Register (SBR) 74
- Trigger Event Register (TRG) 76
- User Event Register (UER) 79
- Local Event Register (LCL) 79
- Enable Mask Value 80
- Block COMP and FAIL 0 80
- Enable COMP, block FAIL 1 80
- Enable FAIL, block COMP 2 80
- Enable COMP and FAIL 3 80
- Arm Event Register (ARM) 82
- Error Queue 83
- Output Queue 84
- Message Queue 84
- Key Queue 84
- Clearing Registers and Queues 84
- Figure 6-3 85
- Installing and Using the 86
- Programmer’s Reference 86
- Reference 87
- <drive>:\install 88
- To start the help file 90
- Introduction 93
- Suffix Multipliers 94
- Programmer’s Quick Reference 100
- Commands and Queries 100
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