curvestream.query()

[enrique062701]

Hello, I am wondering how can I differentiate between channels when attaining data from the scope using commands.curvestream.query(). When using regular 'curve_query,' one can differentiate by stating entering a number that corresponds to the channel (ex: curve_query(1) is channel 1). How can I do this for curvestream()? If I do the same as curve_query on curvestream, I receive an error saying two arguments where given but only 1 is taken.

[amccann-Tek]

Hi @enrique062701,

Can you provide some more details on your setup? What instrument are you using?

Generally speaking I think you need to set the data source using the commands.data.source commands.

-Andrew

[enrique062701]

Hello,
I am using the MSO24. I was told to use the 'curve_stream' command over the 'curve_query' in order to improve the data acquisition time.

[amccann-Tek]

Yeah the curve stream is certainly a faster option but comes with some limitations and more upfront configuration. Were you able to try setting the data source to the relevant channels?

I am currently traveling so I don't have a method to debug and test with you so I have a couple suggestions to get to a resolution faster:

1. Check out the programmers manual, all the python drivers map directly from SCPI commands so the documentation is still the same.
   https://www.tek.com/en/manual/oscilloscope/2-series-mso-programmer-manual-2-series-mso-portable-oscilloscope
   You could also just send the commands directly to see if we have a bug with the MSO2 driver.

2. More direct, technical help can be found from our technical support team.
   https://www.tek.com/en/support/contact-technical-support
   They have the technical knowledge of our portfolio and would be able to walk you through the setup and troubleshoot at each step.

-Andrew

[enrique062701]

Hello,
Thank you for your help. I was able to improve speed by specifying the channel using 'DATa:SOURce' and as well as specifying the encoding for the data so that the scope works less when transmitting it. Thank you for your help.

[amccann-Tek]

Awesome! Thanks for following up. I will go ahead and close this out.

-Andrew