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Appendix B: Block Diagrams
VMA260 & VMA2120
+27V
+27V
Input 3 Mic/Line [Bal]
Input 1 Mic/Line
[1/4" Bal]
BT/USB
Summed RCA
1/4" Bal
Input 2 PTT
Input 2 Mic/Line [Bal]
Music 1 Line
[Summed RCA]
+27V
+27V
Input 6 Mic/Line [Bal]
Input 4 Mic/Line
[1/4" bal]
BT/USB
Summed RCA
1/4" Bal
Input 5 PTT
Input 5 Mic/Line [Bal]
Music 2 Line
[Summed RCA]
VOX
VOX
Attenuation
(VOX/PTT)
Attenuation
(VOX/PTT)
Input 4
Input 5
Input 6
Music 2
TO CH2
TO CH2
TO CH2
TO CH2
TO CH1
TO CH1
TO CH1
TO CH1
Control:
- Input 1 to Ch 2
- CH1_PRIORITY
- CH2_PRIORITY
CH1_PRIORITY
CH2_PRIORITY
Input 4 to Ch 1
- Chime CH2 ON/OFF
- BT/USB to CH2
- Input 2 PTT
- Input 5 PTT
Input 1
- Input 1 to Ch 2
Input 2
- Input 2 to Ch 2
- CH1_PRIORITY
Input 3
Input 3 to Ch 2
Music 1
Music 1 to Ch 2
Input 2 to Ch2
*CH2_CTRL_1*
*CH2_BT_SW*
*CH2_CTRL_4*
Control:
- Chime CH2 ON/OFF
- Input 5 PTT
*CH1_BT_SW*
TO CH2
*CH2_CTRL_3*
Input 5 to Ch 1
Input 6 to Ch 1
Music 2 to Ch 1
