We spent today trying to damp the violin mode that had rung up last night (alog 27469). Two major updates:
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A new damping filter is added to ITMX for 502.744 Hz
- See the attached screenshot for the settings. It uses the MODE7 signal path with a gain of +6 or so.
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The two ETMX modes at 505.707 and 505.711 Hz don't seem to be damping at a good rate.
- With the MODE2 damping path with a positive gain, they sometimes damp and sometimes don't. Not sure what the best setting is.
Nutsinee, Kiwamu,
We cleaned up and rearranged the violin filters today. Unnecessary filters (e.g. 1000 Hz and higher order modes) are removed. As suggested by Evan, we are trying to assign one filter for each fundamental mode. For doing so, we also rearranged the filters so that they line up in ascending order. We did not try getting rid of any of the broadband filters yet; we can still use then when necessary. ISC_LOCK is edited accordingly although we have not gotten a change to test the code.
The attached screenshots show the old settings for ITMY and ETMY, as well as their gain settings. Nutsinee will post the setting information on ITMX and ETMX.
Attached screenshots show the old setting of ITMX (except MODE1 and 2) and ETMX (except MODE1). I splitted all the broadband filters but left those new filters turned off (gain=0) until we have a chance to test them. I only let the guardian turn on what was already turn on before this arrangement. ISC guardian doesn't touch ETMX violin filters so all gains should be 0 there.
I created another wikipage for the new violin mode table with updated filter information to live in. The old table can still be found here.