Novatech DDS transition to manual strangeness
philipstarkey opened this issue · 5 comments
Original report (archived issue) by David Meyer (Bitbucket: dihm, GitHub: dihm).
We’ve been working on some triggering issues with our 409B-AC devices (packaged versions of the DDS9m) and I’ve observed inconsistent behavior when transitioning to manual. Depending on the trigger mode used (async vs. sync) the buffered outputs would blank between shots.
I was able to fix it by placing an “M 0” command in transition to manual. I ended up calling the guy at Novatech and he confirmed that the phase alignment commands “M a/n” do not replace the function of “M 0” when going from table mode to single tone mode, so the change made with the double clutch that removed “M 0” from both transitions seems to be the rub.
I propose changing the phase alignment commands in the transition functions back to “M 0” and making the default phase alignment keyword point to continuous.
Original comment by Chris Billington (Bitbucket: cbillington, GitHub: chrisjbillington).
I think I understand. Thanks for figuring this out!
So at startup, we should send m 0 to ensure it's in single tone mode, followed by either m a or m n to set the phase mode and from then on it's just m t and m 0 to switch between single-tone mode and table mode (without ever re-sending m a or m n)?
Original comment by Chris Billington (Bitbucket: cbillington, GitHub: chrisjbillington).
Great. I'll make the pull request, and will see if we can test it in the labs that care about their phase modes to ensure it is working as expected.
Original comment by Chris Billington (Bitbucket: cbillington, GitHub: chrisjbillington).
Addressed by PR #78
Original comment by Chris Billington (Bitbucket: cbillington, GitHub: chrisjbillington).
- changed state from "new" to "resolved"
Merged in novatech_phase_mode_fix (pull request #78)
Fix issue #37: incorrect transition to manual/buffered semantics for novatech.
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