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Programmer’s Guide
Introduction to GPIB Programming
Programming Fundamentals
Response to Bus Management Commands
The GPIB contains an attention (ATN) line that determines whether the
interface is in command mode or data mode. When the interface is in
command mode (ATN TRUE), a controller can send bus management
commands over the bus. Bus management commands specify which
devices on the interface can talk (send data) and which can listen
(receive data). They also instruct devices on the bus, either individually
or collectively, to perform a particular interface operation.
This section describes how the analyzer responds to the GPIB
management commands. The commands themselves are defined by the
IEEE 488.1 standard. Refer to the documentation for your controller's
language system to determine how to send these commands.
Device Clear (DCL)
When the analyzer receives this command, it does the following:
• clears its input and output queues
• resets its command parser (so it is ready to receive a new program
message)
• cancels any pending
*OPC
command or query
The command does not affect the following:
• front panel operation
• any analyzer operations in progress (other than those already
mentioned)
• any instrument settings or registers (although clearing the output
queue may indirectly affect the status byte's Message Available
(MAV) bit)
Go To Local (GTL)
This command returns the analyzer to local (front-panel) control. All
keys on the analyzer's front-panel are enabled.
Summary of Contents for 8712ES
Page 11: ...1 1 1 Introduction to GPIB Programming ...
Page 27: ...2 1 2 Synchronizing the Analyzer and a Controller ...
Page 36: ...3 1 3 Passing Control ...
Page 39: ...4 1 4 Data Types and Encoding ...
Page 46: ...5 1 5 Using Status Registers ...
Page 71: ...6 1 6 Trace Data Transfers ...
Page 98: ...6 28 Programmer sGuide Trace Data Transfers Internal Measurement Arrays ...
Page 99: ...7 1 7 Using Graphics ...
Page 105: ...8 1 8 Front Panel Keycodes ...
Page 111: ...9 1 9 Introduction to SCPI ...
Page 129: ...10 1 10 Menu Map with SCPI Commands ...
Page 268: ...12 1 12 SCPI Conformance Information ...
Page 290: ...13 1 13 SCPI Error Messages ...