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QBIAS prints what value the system is currently assuming for the chip bias level. BIAS alter it.
ParametersQBIAS requires none. BIAS requires one, the new bias level. If omitted, the current bias is shown, and a new value will be prompted for.
Examples
Adam:> BIAS 200
Notes
The bias level is used in various parts of the system. For example, PHOTOM subtracts it before estimating centres of gravity, and so does the automatic FOCUS procedure.