Transfer functions of the ISS were made for various gain slider settings from 0 dB to 21 dB.
It was quite noticeable that once the gain was increased beyond 16 dB, the loop started
oscillating.  However in the power noise spectra there are a number of features (spikes and
broad peaks) that were not present before.  These are not caused by the noise eater as they
are present when the noise eater is on or off.  The broad peaks are not present in the
spectrum when the light is blocked.  So they may be caused by scattered light.

    More measurements and characterisation is necessary.



  Jason / Peter