Remote Volume Control of Channels

The channel, aux, or master levels can be controlled remotely by a dc voltage via an external VCA (Voltage Controlled Ampli- fier). An example of an external VCA is the ST-VCA1 from Ra- dio Design Labs (1–800–281–2683 or www.rdlnet.com).

Procedure:

For channel control:

1.Connect the tip of a 1/4-in. connector to the line input of the VCA, and the sleeve to the ground of the VCA.

2.Connect the ring to the line output of the VCA.

3.Plug the 1/4-in. connector to the Insert jack of the SCM800.

4.Set the channel level control should be set to 5.

For Aux In control:

1.Connect the external source to the VCA line input.

2.Connect the VCA line output to the tip and sleeve of the SCM800 Aux input.

3.Set the Aux control to 5.

For Master control:

1.Connect SCM800 Line output to the VCA line input.

2.Connect the VCA line output to the external device (amplifi- er, tape recorder, etc.).

3.Set Master control to 5.