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DSO6054A 221 settings conflict error when changing channel coupling

Question asked by rok on May 14, 2013
Latest reply on Jun 19, 2013 by bret

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Hello,

I am running the latest firmware on the above mentioned oscilloscope. (6.16.0001)

I'm trying to change the channel coupling from DC to AC by the 'CHAN1:COUP AC' remote command. But when I try to do it via the ACE interactive window, I get a '221 Settings conflict error'. But when I change it manually on the oscilloscope itself, it lets me do it! So I don't understand why I being blocked from changing it remotely. I looked up the error in the programming guide, but it only talks about it in reference to a waveform subsystem query (Page66). I did check the 'TIMEBASE:MODE?' and it is set to 'MAIN'.

Any ideas why and how to get it to work?

Thanks,
rok

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algoss

May 15, 2013 3:24 AM

Are you in 50 Ohm mode? From the User's Guide, "AC coupling is useful for viewing waveforms with large DC offsets. When AC coupling is chosen, you cannot select 50 Ohm mode. This is done to prevent damage to the oscilloscope."

Al

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bret May 15, 2013 7:36 AM

Hm ... you mentioned being able to change the setting from the front panel, but not from the remote command. That is weird, but I'm gonna guess that you are accessing the Coupling softkey in the Mode/Coupling menu of the front panel instead of the one in the [Ch1] menu (assuming Ch1 is in 50-ohms as well)?

I used to mix up the two different "Coupling" softkeys -- one controls :TRIG:COUP while the other controls :CHAN:COUP.

Well, just my guess.

Edited by: bret on May 15, 2013 8:36 AM

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rok @ bret on May 16, 2013 10:28 AM

Hi,

Thanks for the replies. I'll check to see if the 50ohm mode is enabled or not. Also, you mentioned trigger coupling. It could be possible that I could be mixing it with the channel coupling mode, so I'll double-check that. But do I have to change the trigger coupling to AC first before changing the channel coupling? Maybe that is why it is giving me a settings conflict.

Thanks,
rok

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bret @ rok on Jun 19, 2013 8:05 AM

It seems like the Trigger Coupling and Channel Coupling settings are independent of each other

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4 Replies

algoss May 15, 2013 3:24 AM
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Are you in 50 Ohm mode? From the User's Guide, "AC coupling is useful for viewing waveforms with large DC offsets. When AC coupling is chosen, you cannot select 50 Ohm mode. This is done to prevent damage to the oscilloscope."

Al
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bret May 15, 2013 7:36 AM
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Hm ... you mentioned being able to change the setting from the front panel, but not from the remote command. That is weird, but I'm gonna guess that you are accessing the Coupling softkey in the Mode/Coupling menu of the front panel instead of the one in the [Ch1] menu (assuming Ch1 is in 50-ohms as well)?

I used to mix up the two different "Coupling" softkeys -- one controls :TRIG:COUP while the other controls :CHAN:COUP.

Well, just my guess.

Edited by: bret on May 15, 2013 8:36 AM
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- rok @ bret on May 16, 2013 10:28 AM
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  Hi,
  
  Thanks for the replies. I'll check to see if the 50ohm mode is enabled or not. Also, you mentioned trigger coupling. It could be possible that I could be mixing it with the channel coupling mode, so I'll double-check that. But do I have to change the trigger coupling to AC first before changing the channel coupling? Maybe that is why it is giving me a settings conflict.
  
  Thanks,
  rok
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  - bret @ rok on Jun 19, 2013 8:05 AM
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    It seems like the Trigger Coupling and Channel Coupling settings are independent of each other
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DSO6054A 221 settings conflict error when changing channel coupling

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