6-62
Chapter 6: Programming
Model 801GC, 801GF & 801GX¥Rev. A
Controlling via the IEEE-488 Port
You do not need to do anything special on the 801G*
to use it’s IEEE-488 port. The default settings are
for the 801G* to be a talker/listener with an ad-
dress of 15.
All of the commands and queries shown at the end
of this chapter can be used over the port. This sec-
tion covers how the commands should be sent over
the GPIB bus. Information on additional commands
that can only be sent through the GPIB port is also
included in this section.
Input Buffer
Commands are sent to the 801G* in “program mes-
sages.” A program message consists of one or more
commands separated by a semicolon (;) followed by
a program message terminator. A program message
terminator is defined as the NL character (ASCII
10), or EOI sent with the last byte of the program
message. The 801G* will not parse any commands
received until a program message terminator is re-
ceived. All commands are executed sequentially, that
is, when a command is parsed it is allowed to finish
execution before the next command is parsed.
Since some commands may take longer to execute,
the 801G* has an input buffer. This input buffer is
255 characters long and can be written to by the
host controller while the 801G* is busy executing or
parsing previous messages. If the input buffer be-
comes full, the 801G* will hold off the controller
until there is room in the buffer. For this reason, a
program message cannot be longer than 255 charac-
ters including terminator.
Summary of Contents for 801GC, 801GF, 801GX
Page 1: ...Owner s and Programmer s Manual Model 801GC 801GF 801GX Portable Video Signal Generators ...
Page 16: ...xiv Table of Contents Models 801GC 801GF 801GX Rev A Notes ...
Page 17: ...1 1 Features Product Overview Chapter 1 Introduction ...
Page 21: ...2 1 Operating Modes Displays Indicators Knobs Switches Buttons Chapter 2 Basic Operation ...
Page 31: ...3 1 Introduction Format charts Chapter 3 Built In Formats ...
Page 39: ...4 1 Description of the test images and how to use them Chapter 4 Built In Images ...
Page 126: ...5 14 Chapter 5 Making Connections Model 801GC 801GF 801GX Rev A Notes ...
Page 304: ...6 178 Chapter 6 Programming Model 801GC 801GF 801GX Rev A Notes ...
Page 305: ...7 1 Power on Computer Interfacing If all else fails Chapter 7 Troubleshooting ...
Page 346: ...A 6 Appendix A Specifications Model 801GC 801GF 801GX Rev A Notes ...
Page 355: ...Notes ...