Jeff, Dave:

Following Jeff's SUS changes last tuesday (25th October) we have accrued enough data to report on changes to the frame size and sus front end cpu usage.

Attached is a two week trend of the full frame size. This is a compressed frame, so its size varies dependent upon the state of the interferometer. Drawing an average by eye, the 64 second full frame size has decreased from a mean value of 1.77GB to 1.67GB. This is a 6% disk/tape saving. It equates to a per-second data rate decrease of 27.7 MB/s to 26.1 MB/s (decrease of 1.6 MB/s).

The removal of filters and reduction of DAQ channel decimation also improved the cpu processing time on most SUS models. The attached plot shows the 16 corner station sus and susaux models. They typically report an improvement in cpu time of 10%.