2.5Source Setup
The SQC-122c controls deposition rate by varying the control voltage to an external evaporation (source) supply. The previous illustration for sensor wiring also shows source supply wiring.
The SQC-122c control voltage output range is set in the Systems Params menu. For the supply connected to Output 1, set Scale 1 to the control voltage that corresponds to 100% output on the source supply. The SQC-122c uses 0 volts as 0% output, and the programmed value as 100% output. Scale values from –10 volts to 10 volts are possible.
If you find that very small changes in control voltage yield large changes in deposition rate, you can lower the Scale value to decrease the dynamic range. Also, each Film has a Max Power and Slew Rate parameter that may be used to customize response to that film.
