AMX192

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AMX192 is an analog lighting communications protocol used to control stage lighting. It was developed by Strand Century in the late 1970s and designed to handle 192 channels. Later, multiple AMX192 streams were supported by some desks. AMX192 has now all but died in favour of DMX (lighting).

[edit] History

One of the significant problems in controlling dimmers is getting the control signal from a lighting control unit to the dimmer units. For many years this was achieved by providing a dedicated wire from the control unit to each dimmer (analoge control) where the voltage present on the wire was varied by the control unit to set the output level of the dimmer. In the late 1970s the AMX192 serial analogue multiplexing standard was developed in the US.

At about the same time, D54 was developed in the United Kingdom, and differed from AMX192 in that it used an embedded clocking scheme. AMX192 used a separate differential clock with a driver circuit similar to RS485, but current limited on each leg with 100Ω resistors.