7. Operation with SDSU controller


There may be some problem operating the temperature servo from the SDSU controller since it is designed to use temperature sensing diodes rather than resistance thermometers. The equilibrium temperature of the mosaic in the lab, with the temperature servo disconnected, is -125 degrees C, which is only 5 degrees colder than the chosen operating temperature. Even without the temperature servo running the mosaic should still give satisfactory performance.

One of the CCDs will not image unless Serial Phase 3 is held high during transfer into the serial register.

To minimise leakage into the image area during integration hold all the serial phases , the reset clock and the dump gate high.