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QBI(AS)/BIA(S) - enquire and alter bias level

QBIAS prints what value the system is currently assuming for the chip bias level. BIAS alter it.

Parameters

QBIAS 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.