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
Interface Operation
The oscilloscope can be programmed with a controller over RS-232-C using
either a minimum three-wire or extended hardwire interface. The operation
and exact connections for these interfaces are described in more detail in the
following sections. When you are programming the oscilloscope over
RS-232-C with a controller, you are normally operating directly between two
DTE (Data Terminal Equipment) devices as compared to operating between
a DTE device and a DCE (Data Communications Equipment) device.
When operating directly between two RS-232-C devices, certain
considerations must be taken into account. For three-wire operation, an
XON/XOFF software handshake must be used to handle handshaking
between the devices. For extended hardwire operation, handshaking may be
handled either with XON/XOFF or by manipulating the CTS and RTS lines of
the oscilloscope. For both three-wire and extended hardwire operation, the
DCD and DSR inputs to the oscilloscope must remain high for proper
operation.
With extended hardwire operation, a high on the CTS input allows the
oscilloscope to send data and a low on this line disables the oscilloscope data
transmission. Likewise, a high on the RTS line allows the controller to send
data and a low on this line signals a request for the controller to disable data
transmission. Because three-wire operation has no control over the CTS
input, internal pull-up resistors in the oscilloscope ensure that this line
remains high for proper three-wire operation.
Cables
Selecting a cable for the RS-232-C interface is dependent on your specific
application. The following paragraphs describe which lines of the oscilloscope
are used to control the operation of the RS-232-C bus relative to the
oscilloscope. To locate the proper cable for your application, refer to the
reference manual for your controller. This manual should address the exact
method your controller uses to operate over the RS-232-C bus.
Programming over RS-232-C
Interface Operation
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