Shure AMS8100 Betriebsanweisung PDF herunterladen (Seite 14)

Inhibit Function

For information on the inhibit function, refer to the

Internal

Modifications

section.

Remote Volume Control

The level of the Aux or Master output can be controlled from an

external VCA (Voltage Controlled Amplifier) such as the RU-

VCA1 from Radio Design Labs (Tel. 1–800–281–2683, or

www.rdlnet.com). To connect a VCA to the SCM410, proceed

as follows:

1. Connect the SCM410 Line output to the VCA line input.

2. Connect the VCA line output to the external device.

3.For remote Master level control, set the SCM410 Master

control to 5.

Diode Isolation of Logic Controls

Two or more control functions that use the same logic pins can

be isolated with diodes, as shown in Figure 27. With this modi-

fication, a channel can be muted by an overall group mute

switch, or by its own cough button.

GROUP

MUTE

COUGH

D = 1N4148 OR

EQUIVALENT

LOGIC

GROUND

BUTTONS

DIODE ISOLATION OF LOGIC TERMINALS

FIGURE 27

External Logic Devices

SCM410 logic levels are directly compatible with TTL and 5V

CMOS logic families. Mixer logic may be used with 15V CMOS

logic if a pull-up resistor is used with each GATE output. See

Figure 28.

NOTE: For information on logic gate use, refer to the

TTL

Cookbook

and

CMOS Cookbook

, both by D. Lancaster,

Howard Sams Publishing Co.

15 V

POWER

–

SUPPLY

CMOS

GATES

5.1 K

LOGIC

GROUND

15V CMOS

FIGURE 28

Digital Controls or Microcomputers

The SCM410 logic pins can interface with custom-designed

digital control circuitry or microcomputers for unlimited possi-

bilities of system control functions.

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