Inhibit Function, Remote Volume Control

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.

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.

	5.1 K	15 V
	5.1 K	POWER
		POWER
		SUPPLY

CMOS

GATES

G1 O1

GROUP

MUTE

COUGH

BUTTONS

D = 1N4148 OR EQUIVALENT

LOGIC

GROUND

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.

DIODE ISOLATION OF LOGIC TERMINALS

FIGURE 27

SCM410E, SCM410 specifications

The Shure SCM410 and SCM410E are state-of-the-art automatic microphone mixers designed to enhance audio performance in various professional environments. Known for their reliability and advanced features, these mixers are a popular choice for broadcasters, conferencing systems, and live event productions.

One of the key features of the SCM410 is its Automatic Gain Control (AGC) system, which intelligently adjusts the gain of connected microphones based on their audio levels. This ensures that the output remains consistent, making it ideal for situations where multiple speakers might share the microphone, such as panel discussions or meetings. The SCM410E variant further enhances this functionality with extended connectivity options, catering to more complex audio setups.

Both models incorporate Shure's exclusive IntelliMix technology. IntelliMix employs sophisticated algorithms to minimize interference and eliminate feedback, which is crucial for maintaining intelligibility in crowded sound environments. The mixers automatically manage the microphone levels, activating only those that are in use while suppressing those that are not, which not only enhances audio clarity but also helps in reducing background noise.

The SCM410 features four microphone inputs, allowing operators to connect multiple microphones simultaneously. Users can easily control each input's level, with individual gain adjustments and a master output level control. Additionally, LEDs provide visual feedback on the status of each microphone, indicating when they are active or inactive. The SCM410E goes a step further, offering additional mic input options and enhanced flexibility for integration into larger systems.

Durability is a hallmark of the SCM410 and SCM410E, as they are constructed with high-quality materials, designed to withstand the rigors of professional use. The intuitive interface makes them accessible for both novice users and seasoned sound engineers.

With a phantom power switch for condenser microphones, an easy-to-read, backlit display, and robust connectivity options, the SCM410 and SCM410E are versatile tools for any audio setup. Their ability to automatically mix and control audio levels in real-time ensures that users can deliver presentations, discussions, and performances with clarity and confidence. Whether it’s in a corporate boardroom or a live concert venue, these automatic microphone mixers deliver high-quality sound tailored to the needs of modern audio applications.