26Appendix B : Block DiagramFigure C CSMA 2120/280/240 Block Diagram∑CH2 TO AMP1CH8 TO AMP1CH1 TO AMP1CH1 TO AMP2SW1SW2CH2 TO AMP1CH2 TO AMP2SW7SW8CH5 TO AMP2CH5 TO AMP1CH3 & CH4 Similar to CH2CH7 & CH8 Similar to CH6Input GainLineMicInput Gain LineMicInput GainLineMicInput Gain LineMicCH1CH2CH5CH6Phantom PowerMic/Line[Bal]Mic/Line[Bal]Mic/Line[Bal]Mic/Line[Bal]CH1 PTTCH5 PTTRCA[MONOSUM]RCA[MONOSUM]Gain 1Gain 2SPISPICH1 VOXCH5 VOXGain 5Gain 6 CH6 TO AMP2CH6 TO AMP1CH1 PriorityCH1 TO AMP2CH8 TO AMP2CH5 TO AMP2(Exclude)(SW6)∑CH1 TO AMP2CH5 TO AMP2(Closed as CH1 Route to AMP2)CH5 PrioritySPISPI∑Attenuation∑AttenuationOROROR