I am using a custom external voltage amplifier to apply the bias voltage higher than +-10V.
I changed 'Instrument/Bias-Gain' in the preference to the gain of the amplifier (x3).
While I could change 'Upper Limit' of dsp-fbs-bias to 30V, I could not change 'Lower Limit' for some reason.
Whenever I put a new value lower than -10V, it does not allow.
There is some odd issue, a more generic gxsm wide issue effecting all neg limits, been reset to -10 when edited...
For a work around, do NOT use the dialog to adjust the limits, BUT use the system tool dconf Editor. See screenshot attached. Find the setting as shown and adjust the limits as desired (I put +/-20 in for a test).
Do this before starting gxsm3 -- or restart it after adjusting as it does not get a change notification if you edit it there!
Thank you, Percy. The method with dconf-editor works for dsp-fbs-bias.
However, I noticed that it does not work for dsp-z-start. Even after I did the same kind of changes with dconf-editor, the negative limit value goes back to 10 V. Very strange.
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BTW: You actually can reconfigure the limits (lower included) via Gxsm I found:
Open the configure Dialog and type in the value you want, BUT do not hit Enter or do anything else, just click OK and it takes it!
PS: I have not yet figured out why it complains for all limits at -10 when hitting enter, or do anything else... and set it back to -10 then.
PPS:: Fixed the config dialog issue. In git now. The Entry Spinner-Limits/updates were interfering, removed spin feature from config as not needed here solved the issue.
Last edit: Percy Zahl 2024-05-28
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello all,
I am using a custom external voltage amplifier to apply the bias voltage higher than +-10V.
I changed 'Instrument/Bias-Gain' in the preference to the gain of the amplifier (x3).
While I could change 'Upper Limit' of dsp-fbs-bias to 30V, I could not change 'Lower Limit' for some reason.
Whenever I put a new value lower than -10V, it does not allow.
Is there any other way to change this limit?
Thank you,
Yoichi
I have to check if there is (must be, just not sure it it is at -10V) limit for the "neg limit" setting if I understand you right.... hang on...
There is some odd issue, a more generic gxsm wide issue effecting all neg limits, been reset to -10 when edited...
For a work around, do NOT use the dialog to adjust the limits, BUT use the system tool dconf Editor. See screenshot attached. Find the setting as shown and adjust the limits as desired (I put +/-20 in for a test).
Do this before starting gxsm3 -- or restart it after adjusting as it does not get a change notification if you edit it there!
Thank you, Percy. The method with dconf-editor works for dsp-fbs-bias.
However, I noticed that it does not work for dsp-z-start. Even after I did the same kind of changes with dconf-editor, the negative limit value goes back to 10 V. Very strange.
Send me what all "unusal limits" need and I'll have a look.
I tried to change dsp-z-start by dconf-editor once again, it works now. Sorry for confusion.
OK.
BTW: You actually can reconfigure the limits (lower included) via Gxsm I found:
Open the configure Dialog and type in the value you want, BUT do not hit Enter or do anything else, just click OK and it takes it!
PS: I have not yet figured out why it complains for all limits at -10 when hitting enter, or do anything else... and set it back to -10 then.
PPS:: Fixed the config dialog issue. In git now. The Entry Spinner-Limits/updates were interfering, removed spin feature from config as not needed here solved the issue.
Last edit: Percy Zahl 2024-05-28
I tried the way you described. It indeed works!
Thank you!