DiSEqC (Digital Satellite Equipment Control), pronounced "Die-Sec", is a special communication protocol for use between a satellite receiver and a device such as a multi-dish switch or a small dish antenna rotor.DiSEqC relies only upon a coaxial cable to transmit both bidirectional data/signals and power.DiSEqC is also compatible with the actuators used to rotate large C band dishes if used with a DiSEqC positioner.
A number of variations of DiSEqC exist:
DiSEqC 1.0, which allows switching between up to 4 satellite sources
DiSEqC 1.1, which allows switching between up to 16 sources
DiSEqC 1.2, which allows switching between up to 16 sources, and control of a single axis satellite motor
DiSEqC 2.0, which adds bi-directional communications to DiSEqC 1.0
DiSEqC 2.1, which adds bi-directional communications to DiSEqC 1.1
DiSEqC 2.2, which adds bi-directional communications to DiSEqC 1.2
A 1.x receiver will not be able to receive communication from a switch or motor. Usually this is not important, as the switch or motor can be controlled by the receiver without problems
1.0 receiver supports DiSEqC 1.0 switch only, which allows switching between up to 4 satellite sources.
1.1 receiver supports DiSEqC 1.0 as well as DiSEqC 1.1 switches, which allows switching between up to 16 sources.
Connection of 8 LNB's using a 4*1 diseqc and four 22khz switches.
LNB 1: DiSEqC port 1, 22kHz OFF
LNB 2: DiSEqC port 1, 22kHz ON
LNB 3: DiSEqC port 2, 22kHz OFF
LNB 4: DiSEqC port 2, 22kHz ON
LNB 5: DiSEqC port 3, 22kHz OFF
LNB 6: DiSEqC port 3, 22kHz ON
LNB 7: DiSEqC port 4, 22kHz OFF
LNB 8: DiSEqC port 4, 22kHz ON
