The operator console is remarkably easy to use. The operator simply enters the kVp and mAs technique factors. Â»The SPECTRA 30HF generator automatically selects the highest mA and shortest exposure time possible. Â»The dual mAs/ma digital display provides the operator with the opportunity to view the mA the SPECTRA 30HF selected. Giving the operator total control, the mA can be modified when longer exposure times are desired.