Control Voltage Out
When a microphone channel turns “on,” as indicated by a Selected Channel LED on the front panel, the channel’s associated Control Voltage Out goes “high” (+4 VDC). See chart on page 12 for pin connection. This signal can be used to light indicator lamps, switch speaker zones on and off, select video cameras, etc. The control voltage should not be connected directly to an inductive load such as a relay coil, as damage to the mixer may result. Several interface circuit possibilities are shown in Figure 6 below.
Equivalent Output |
| Driving One LED | |
Circuit for Control |
| ≈ | 2v |
Voltage Out |
| ||
| I | Ω | |
|
|
| R+40 |
|
| CV |
|
40Ω | CONTROL |
| R |
VOLTAGE |
| ||
|
|
| |
| GND | G |
|
Relay Driver |
| Driving Lamps | ||
| IN4001 | RELAY |
|
|
|
| COIL |
| + |
|
| + |
| |
CV | 10KΩ |
| CV | 10KΩ |
|
| 2N3904 |
| 2N3904 |
G |
|
| G |
|
Driving Logic Gates
CV
G
Figure 6. Control interface examples.
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