Anritsu MT8801C - General Description

Section 2 Device Messages
2-2
2.1 General Description
A device message is a data message transmitted between the controller and device via
the system interface. Device messages are classified into program messages and re-
sponse messages.
A program message is an ASCII data message transferred from the controller to the
device. Program messages are classified into program commands and program que-
ries.
Program commands are classified into device-specific commands used exclusively to
control the MT8801C, and IEEE488.2 common commands. IEEE488.2 common
commands are also used for other measuring instruments conforming to IEEE488.2
connected to the bus.
A program query is a command used to obtain a response message from the device. It
is transferred from the controller to the device in advance, then the controller receives
the response message from the device.
A response message is an ASCII data message transferred from the device to the con-
troller.
• Program command
• Program query
• IEEE488.2 common command
• Status message
Program message
• Response message
Response message
Device
Controller
Program messages and response messages may have a suffix (units) at the end of the
numeric data.