Data Inquiry
• Inquiry of data by the external controller is made using a query command or a data
output request from the controller.
• Query commands end with a question mark (?).
• For query commands with an argument, the argument is specified in the form of
<wsp> + <argument> at the end of the “?”.
• When a query command is received, the instrument prepares a reply to the query
command in the output buffer.
• Data in the output buffer will be retained until the instrument receives an input
statement or a new query command from the controller.
• If multiple query commands are specified and written in succession using a semicolon
“;”, the instrument prepares replies to all of them in the output buffer. In this case, the
instrument will collectively output all of the prepared data when receiving the next data
output request.
Setting the timeout time
A timeout time setting of 30 seconds or more is recommended.
At approximately 10 minute intervals, the instrument performs an auto offset for
approximately 30 seconds. The communication timeout of the external controller should
be set to 30 seconds or more so that a timeout does not occur during the execution of
the offset. See the user’s manual of your remote interface card for instructions on how to
set the communication timeout time.
The instrument's auto offset function is set to ON by default, and it performs offset of the
analog circuits at approximately 10 minute intervals. The offset process takes about 30
seconds. On the AQ6373 and AQ6375, during this offset process, the receiving of remote
commands, execution of remote commands, and talker data transmission processes
are suspended. If an external controller sends a remote command or requests output
of talker data while the suspension is in effect, the external controller may experience
a communication timeout error because the instrument cannot perform the requested
action until the offset process is complete.
If you do not want to set the communication timeout to 30 seconds or less
To avoid remote malfunctions due to communication timeouts, offset processing can be
performed manually. Turn the auto offset function OFF in advance, and perform the offset
manually during a gap in measurement sequences. Wait approximately 30 seconds
until the offset process is finished. After the offset is complete, restart the measurement
sequence.
The remote commands are as follows.
Turn OFF the auto offset function
:CALibration:ZERO off
Perform a manual offset
:CALibration:ZERO once
Note
• An offset interval of 10 minutes is recommended.
• If the AUTO OFFSET key is OFF, the offset can fluctuate over time, and the level axis
performance can degrade. Always have it turned ON.
• When the AUTO OFFSET key is set to ON, is displayed at the bottom of the screen.
Device Trigger Function
When GET (Group Execute Trigger) is received, the instrument will perform a single
sweep.
1.3 Sending/Receiving Remote Commands
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