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
Status Reporting
Figure 6-1 is an overview of the oscilloscope’s status reporting
structure. The status reporting structure allows monitoring specified
events in the oscilloscope. The ability to monitor and report these
events allows determination of such things as the status of an
operation, the availability and reliability of the measured data, and
more.
• To monitor an event, first clear the event, then enable the event. All
of the events are cleared when you initialize the instrument.
• To generate a service request (SRQ) interrupt to an external
controller, enable at least one bit in the Status Byte Register.
The Status Byte Register, the Standard Event Status Register group,
and the Output Queue are defined as the Standard Status Data
Structure Model in IEEE 488.2-1987.
IEEE 488.2 defines data structures, commands, and common bit
definitions for status reporting. There are also instrument-defined
structures and bits.
The bits in the status byte act as summary bits for the data structures
residing behind them. In the case of queues, the summary bit is set if
the queue is not empty. For registers, the summary bit is set if any
enabled bit in the event register is set. The events are enabled with
the corresponding event enable register. Events captured by an event
register remain set until the register is read or cleared. Registers are
read with their associated commands. The *CLS command clears all
event registers and all queues except the output queue. If *CLS is sent
immediately following a program message terminator, the output
queue is also cleared.
6-2