Section 7 Remote Control Using PC
7-6
7.2.5 Program message and response message
The device message is classified into the program message and the response mes-
sage.
The program message is instruction data to the controlled device. The message op-
erates the device, or queries the measurement results and device status.
The response message is data indicating measurement results or device status. In
this manual, the response message is simply denoted as response.
7.2.6 Programming command and query
The program message is further classified into the programming command and the
query.
The programming command is a message for operating a device. In this manual,
the programming command is simply denoted as the command.
The query is a message to query for measurement results and device status.
7.2.7 Overlap command
The GPIB command is classified into the overlap command and the sequential com-
mand depending on the way of being processed.
For the overlap command, multiple commands are simultaneously processed. For
the sequential command, the next command is waited in a queue while one command
is being processed.
MT8820A does not support the overlap command. All commands are processed as
the sequential command. That is, the remote control commands transmitted to the
MT8820A are processed in the transmitted order.
7.2.8 Command notations in this manual
This operation manual classifies the device messages used for the MT8820A into
three categories, shown below:
(1) Command
A command executes a specific MT8820A function or changes the setting.
(2) Query
A query makes an inquiry about the setting of MT8820A or information on the
MT8820A status.
(3) Response
On receiving a query, MT8820A returns the specified information as a response
to the computer.
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