Ceyear 3943B, Руководство по эксплуатации

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6 Remote control
6.1 Remote control principals
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control.
6) The scalability of SCPI makes it a "live" standard.
For those interested in learning more about SCPI, please refer to:

IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable Instrumentation.
New York, NY, 1998.

IEEE Standard 488.2-1987, IEEE Standard Codes, Formats, Protocols and Comment Commands
for Use with ANSI/IEEE Std488.1-1987. New York, NY, 1998.

Standard Commands for Programmable Instruments(SCPI) VERSION 1999.0.
For the collection, classification and description of remote control commands for 3943B monitoring
receivers, please refer to:
1) Appendix B SCPI command quick reference table.
2) Remote Control Manual 3. Remote Control Commands section.
3)
Program Control Manual 6.2 Appendix B SCPI Commands Quick Reference Table (by Subsystem ).
6.1.3.2 SCPI command description
1) General terms
The following terms apply to this section. To better understand the chapters, you shall understand the
exact definitions of the terms.
a) Controller
The controller is a computer that is used to communicate with the SCPI device. The controller may be a
personal computer, a minicomputer, or a plug-in card on a card cage. Some AI devices can also be used
as controllers.
b) Device
The device is a SCPI-enabled device. Most of the devices are electronic measurement or excitation
devices and communicate using the GPIB interface.
c) Program message
A programmed message is a combination of one or more properly formatted SCPI commands. Program
messages tell the devices how to measure and output the signals.
d) Response message
The response message is a collection of data in the specified SCPI format. The response message is
always from the device to the controller or listening device. Response messages tell the controllers
about the internal state or measured values of the devices.
e) Command
Commands are those that satisfy the SCPI standard. The combination of commands controlling the
devices forms a message. In general, a command includes keywords, parameters, and punctuation.
f) Event command
Event-type program control commands cannot be queried. An event command generally has no
corresponding front panel key setting, and its function is to trigger an event at a specific time.
g) Query
A query is a special type of command. When a control device is queried, a response message
appropriate to the controller syntax requirements is returned. A query statement always ends with a
question mark.
2) Command type
There are two types of SCPI commands: general-purpose commands and instrument-specific
commands. The generic commands are defined by IEEE 488.2 and are used to manage macros, status
registers, synchronization, and data storage. Since the generic orders are all headed by an asterisk, they