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Appendix B : Block Diagram
Figure C CSMA 2120/280/240 Block Diagram
∑
CH2 TO AMP1
CH8 TO AMP1
CH1 TO AMP1
CH1 TO AMP2
SW1
SW2
CH2 TO AMP1
CH2 TO AMP2
SW7
SW8
CH5 TO AMP2
CH5 TO AMP1
CH3 & CH4 Similar to CH2
CH7 & CH8 Similar to CH6
Input Gain
Line
Mic
Input Gain
Line
Mic
Input Gain
Line
Mic
Input Gain
Line
Mic
CH1
CH2
CH5
CH6
Phantom Power
Mic/Line
[Bal]
Mic/Line
[Bal]
Mic/Line
[Bal]
Mic/Line
[Bal]
CH1 PTT
CH5 PTT
RCA
[MONO
SUM]
RCA
[MONO
SUM]
Gain 1
Gain 2
SPI
SPI
CH1 VOX
CH5 VOX
Gain 5
Gain 6
CH6 TO AMP2
CH6 TO AMP1
CH1 Priority
CH1 TO AMP2
CH8 TO AMP2
CH5 TO AMP2(Exclude)
(SW6)
∑
CH1 TO AMP2
CH5 TO AMP2
(Closed as CH1 Route to AMP2)
CH5 Priority
SPI
SPI
∑
Attenuation
∑
Attenuation
OR
OR
OR
Tone Control
Scaling
Power
AMP1
Output
XFMR
HPF CNTL
+
-
COM
100V
70.7V
Tone Control
Scaling
Power
AMP2
Output
XFMR
HPF CNTL
+
-
COM
100V
70.7V
Preamp Line Out 1
Preamp Line Out 2
VCA 1
VCA 2
(SW5)
(SW11)
Master 1
Master 2
SPI 1Clip 1
Limiter
Limiter
SPI 2
Clip 2
Bass Treble
Bass
Treble
VCA
VCA
HPF
HPF