How to clear the output queue while using the socket server

[bbawj]

Hi! I am not sure if questions outside the use of tm_devices are allowed, please feel free to close this.

I am writing a library, supporting the socket backend. However, I noticed that at times despite shutting down and closing the TCP socket connection, creating a new connection and writing new queries may still result in output from past queries. I have tried to send "DCL" as noted in the manual to no avail.

So far, I found that only restarting the socket server would help. However, there is no way to do this programmatically.

• "socketserver:enable 0;:socketserver:enable 1" does not re-enable the socket server.
• *RST would need me to re-configure my scope

[amccann-Tek]

Hi @bbawj. We will always try to help or at least direct you to people who can so don't worry about that.

What instrument are you communicating with?

-Andrew

[bbawj]

Thanks for your reply Andrew, I am working with the MSO54B oscilloscope.

[amccann-Tek]

I just searched for any known issues with the socket server and separately the device clear command and I didn't see anything (might still exist though, I can't search everything).

Just to be explicit you are sending the !d over the terminal to do the device clear or sending "DCL" as a command?

I would also recommend reaching out to our Application Engineers to see if they have a remedy, and if they don't they will log it and get it in queue to be fixed.

[bbawj]

I am sending "DCL" as a command, as I am not using the terminal protocol. Is that the correct command? Thanks for pointing me to the support channel.

[amccann-Tek]

I am not very familiar with raw socket usage (and my coworker who is is out of office for the week).

I was referencing this section in the manual:

Socket Server Terminal Protocol Mode Commands. Following are Tektronix
Instrument Control Terminal Session Control commands:
!t : set the response timeout in milliseconds.
!d : send device clear to the instrument.
!r : read response from instrument.
!h : print this usage info.

[bbawj]

!d seems to work! thank you.