AMC desks are normally used to control permanently installed Permus dimmer racks, or existing STM or JTM racks, but can also be used with Tempus portable dimmer racks. Each Channel module has 10 consecutively numbered control channels. There is a Red, a White and a Blue preset fader for each channel and a 3-position switch above each fader to select to the A, B or C group for that preset. Every group also has a Blackout switch and an indicator to highlight which are active. The method of mastering ensures that any group, or groups, can be crossfaded with any others without any unwanted change to channels set to the same intensity in both the incoming and outgoing lighting, but linear for all channels that should change.
Groups can be pile-added with the highest intensity level taking precedence.
The progress towards completion of the crossfade is shown by a column of indicator lamps alongside the scale of the crossfader. Timing can be preset, but also acclerated or retarded, on the Time fader. AMC Effects module This optional module features two sophisticated effects generators, plus a four frequency band sound to light convertor. The two effects generators each have 7 different modes for variable speed chase and cycle functions, including progression triggered by the bass beat of an external audio signal. The vertical columns of push switches and a flash push select the nine group masters of the AMC master module to any of the effects sources.