CAMAC Progress Report

                      Week Ending: March 22, 2002
                               Week: 60


Tom Folkers:
     1. More work on DBE.
     2. Completed work on SAMBUS driver and application program.
     3. Mostly have the 'respond' program done. This program generates 
        structured messages from the DBE backend to the master control 
        computer. Which are, in turn, copied into global memory.
     4. Installed SCCS into all development computers for all software 
        participants to use.

Tom Sargent:
     1. The sun avoidance algorithm is generating paths OK, but I had 
        trouble working out the velocity as a function of time 
        correctly. I considered switching to a completely different 
        approach, but in a last try, I got a couple bugs fixed and 
        found a way to compute a smooth V(t) curve that works.  The 
        simulation behaves like a perfect telescope, so I can't be 
        sure how well it will work until I get to try it on the 
        telescope.
     2. Fixed a few more bugs/misconceptions in old code and, for the 
        time being, configured the software to avoid the discontinuity 
        in azimuth in the north, that is, it will not go to negative 
        azimuths or beyond 360. To move from 1 degree azimuth to 359 
        it will go around the long way rather than cross the meridian 
        north of the zenith. I'll add in the -90 to 0 and the 360 to 
        450 ranges after the next run.

Pete Hubbard:
     1. Started comparing TLC2654  and LTC1052 for drift over 
        temperature and warm-up time with encoder ROD456. Taking a 
        fourth set of data today.
     2. DBE  logic noise can be reduced with slower rise and fall 
        times than the 74LS logic that is driving the counters now. I 
        have borrowed a logic analyzer for testing.
     3. Looking at ways to simulate the VCO signals that feed the 
        counters.

Lori Warner:
     1. Housekeeping & VxWorks preparation.
     2. Waiting for VxWorks workstation.

Dave Ashby:
     1. No Report.