Programming instructions
Table Of Contents
- Contents
- Title Page
- Chapter 1 Introduction to Programming
- Chapter 2 Programming Getting Started
- Chapter 3 Programming over HP-IB
- Chapter 4 Programming over RS-232-C
- Chapter 5 Programming and Documentation Conventions
- Chapter 6 Status Reporting
- Figure 6-1. Status Reporting Overview Block Diagram
- Table 6-1. Status Reporting Bit Definition
- Status Reporting Data Structures
- Status Byte Register (SBR)
- Service Request Enable Register (SRER)
- Trigger Event Register (TRG)
- Standard Event Status Register (SESR)
- Standard Event Status Enable Register (SESER)
- User Event Register (UER)
- Local Event Register (LCL)
- Operation Status Register (OPR)
- Limit Test Event Register (LTER)
- Mask Test Event Register (MTER)
- Histogram Event Register (HER)
- Arm Event Register (ARM)
- Error Queue
- Output Queue
- Message Queue
- Key Queue
- Clearing Registers and Queues
- Figure 6-3. Status Reporting Decision Chart
- Chapter 7 Installing and Using the Programmer's Reference
- Chapter 8 Programmer’s Quick Reference
- Warranty
- Index
Minimum Three-Wire Interface with Software Protocol
With a three-wire interface, the software (as compared to interface
hardware) controls the data flow between the oscilloscope and the controller.
This provides a much simpler connection between devices since you can
ignore hardware handshake requirements. The oscilloscope uses the
following connections on its RS-232-C interface for three-wire
communication:
•
Pin 7 SGND (Signal Ground)
•
Pin 2 TD (Transmit Data from oscilloscope)
•
Pin 3 RD (Receive Data into oscilloscope)
The TD (Transmit Data) line from the oscilloscope must connect to the RD
(Receive Data) line on the controller. Likewise, the RD line from the
oscilloscope must connect to the TD line on the controller. Internal pull-up
resistors in the oscilloscope ensure the DCD, DSR, and CTS lines remain high
when you are using a three-wire interface.
No Hardware Means to Control Data Flow
The three-wire interface provides no hardware means to control data flow
between the controller and the oscilloscope. XON/OFF protocol is the only
means to control this data flow.
Programming over RS-232-C
Minimum Three-Wire Interface with Software Protocol
4-4