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The Mintron camera can be controlled with the program mintronctrl, installed currently at the m5 machine. By simply executing this command (without any arguments), it prints the currently configured gain and exposure time values as well as reports the temperature of the frontend:

m5:~$ mintronctrl 
gain=4 exp=5

The exposure times can be set with the

mintronctrl --exp n

command, where n is an integer between 0 to 12, from shortest to longest. Note that these are dimensionless numbers, and the scale is roughly logarithmic. The gain value can be altered with

mintronctrl --gain m 

where m is an integer between 0 and 8. While in ThAr or Flat mode with the spectrograph, set these values to

mintronctrl --exp 1 --gain 0.

For regular use, i.e. observe normal star fields, use the setup

mintronctrl --exp 4 --gain 4.