CAMAC Progress Report

                     Week Ending: January 11, 2002
                               Week: 50


Tom Folkers:
     1. No Report.

Tom Sargent:
     1. Since the A/Ds that read the shaft encoders have been sent 
        back to Traquair to have 1KHz filters installed, I have 
        modified the DSP code and servo to simulate the presence of 
        the encoder data.  The servo program reports all changes in 
        the velocity signal which it is outputting and the DSP 
        calculates how the encoders should respond.  It works well 
        except for a slight problem due to the simulated data samples 
        not being precisely synced to the IRIG-derived signal. The DSP 
        UT drifts slowly relative to servo's UT which causes warning 
        messages to be printed every 15 minutes.
     2. Found and fixed a bug in the command processing code in the 
        DSP which must have been responsible for some very occasional 
        error messages about garbled commands.

Pete Hubbard:
     1. Previous week at SMT encoder testing with HP Dynamic signal 
        analyzed to find noise sources that degrade encoder readings.
     2. Arranged for Traquair A/D to be modified by the factory to 
        have 1 KHZ low pass filter's added.
     3. Testing new amplifier with a higher chopping frequency in the 
        encoder test board.

Dave Ashby:
     1. No Report.