I recieved some data from Newport for vibrations from the MFM-100. I am not sure how they took this data and will update this post/comment on this post when I find out. For now, attached are the graphs shared with me. The resonances are around the frequencies we observed some noise in the output filter caviites.
Note: the picture of the mount in the images is only to show the axis; the mount does not look like the image shown.
From Newport:
The data shared is the frequency response to a sine sweep test using an in-house shaker system.
The MFM-100 does have natural resonances in the 300-500 Hz range. This is normal.
Seeing a peak within 5% of tested samples is not totally alarming.
Provided it doesn’t jeopardize any performance, adding a material with a high damping coefficient at the mounting interface like viton, sorbothane, etc. will certainly work.