Connections
External Control Connections
The SMR 821 provides a powerful external control option. This feature allows you to configure remote controls for the Master Left/Right volume and the Channel 7/8 select function. The Remote connector provides a simple way to make these connec- tions. NOTE: Use only shielded cable! Refer to the illustrations below.
Remote |
Volume |
This example is used to control the Left/Right Master Volume Control from a remote location with a simple connection on the back of the unit. A 10k pot will provide approximately 0 to 30dB of attenuation. A 100k pot will provide about 0 to 60dB of attenua- tion. If desired, a control voltage can be inserted to “command” attenuation instead of a pot. This voltage is inserted into the “C” input and is positive referenced to SHD. NOTE: THE CONTROL VOLTAGE SHOULD NEVER EXCEED 11 VOLTS DC.
Remote Volume Control Connections
Volume Control to Potentiometer CW Leg (V) Control to Potentiometer Wiper Leg (C) Shield Potentiometer CCW Leg (SHD)
Figure 5. Remote Volume Control Connections
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| This example shows the connection for remote selection of the |
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| Channels 7 or 8 input select feature. The selection is done by con- |
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| necting a momentary switch between SEL and SHD. Each time |
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| the switch is actuated, the channel selection is toggled and alter- |
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| nated between Channel 7 and 8. This remote operation functions |
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| in conjunction with the front panel Select Control. A |
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| LED or 2 individual LEDs may be connected as shown in the |
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| diagram for remote indication of the selected stereo line input. |
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| NOTE: The IND circuit can supply a maximum of 6ma for the |
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| LEDs’. Take care that you do not exceed this current limitation. |
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| Remote Channel 7/8 Select Connections |
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| Shield (SHD) |
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| Channel 7/8 Select (SEL) |
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| Indicator LED Output (IND) |
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Select |
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| Select LEDs |
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Switch |
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| Ch 7 |
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Figure 6. Remote Channel 7/8 Select Connections |
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Peavey Electronics Corp |
| Page 11 | ||||
