ADVANCED FUNCTIONS

The SCM810's Advanced Functions are recommended only for those who are technically knowledgeable and familiar with audio

electronics.

LOGIC CONNECTION SPECIFICATIONS

The logic functions of the SCM810 expand the mixer's range of installation and control options. Logic can be used for everything from simple cough switches to elaborate computer-controlled room systems. (Shure's AMS Update publication contains additional applications of advanced logic. This publication is available by contacting Shure's Applications Group.) The fol- lowing logic functions are available for each channel:

GATE OUT: Follows channel gating and goes to logic “low” (sinks current) when microphone is gated on. 500 mA of current sinking ability is provided (see Figure 10A).

+5 V

 

+5 V

10K

 

55K

 

MUTE IN

TO

GATE

OR

SCM810

OVERRIDE

OUT

CIRCUIT

IN

 

 

FROM

 

 

SCM810

 

 

CIRCUIT

 

 

LOGIC

 

 

GROUND

 

 

A

 

B

LOGIC EQUIVALENT CIRCUIT DIAGRAMS

FIGURE 10

MUTE IN: Applying logic “low” (from GATE OUT or a switch closure to logic ground) gates channel off (see Figure 10B). Channel output drops to -∞.

OVERRIDE IN: Applying logic “low” (from GATE OUT or a switch closure to logic ground) forces channel on (see Figure 10B). Factory setting pro- vides that when both Mute and Override are activated, Mute takes prece- dence (see Internal Modifications for Override precedence).

LOGIC GROUND: Logic ground is distinct from the SCM810 audio ground. Make all logic ground connections to this pin, including power supply ground of external logic circuitry. To avoid switching clicks, do not connect logic ground to audio, chassis or rack grounds.

Logic controls are accessed at the DB-25 multi-pin connector on the rear panel (Figure 11). The pin connections are given in the following table.

GATE 1

 

GATE 3

 

GATE 5

 

GATE 7

 

LOGIC

 

MUTE 1

 

MUTE 3

 

MUTE 5

 

MUTE 7 GROUND

 

 

 

 

 

 

O’RIDE 2

 

 

O’RIDE 4

 

 

O’RIDE 6

 

 

O’RIDE 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUTE 2

MUTE 4

MUTE 6

MUTE 8

GATE 2

 

GATE 4

 

GATE 6

 

GATE 8

O’RIDE 1

O’RIDE 3

O’RIDE 5

O’RIDE 7

LOGIC CONNECTOR

FIGURE 11

LOGIC CONNECTIONS

Logic Function

Input

Connector Pin No.

 

Channel

 

 

 

 

GATE OUT1

1

1

GATE OUT 2

2

15

GATE OUT 3

3

4

GATE OUT 4

4

18

GATE OUT 5

5

7

GATE OUT 6

6

21

GATE OUT 7

7

10

GATE OUT 8

8

24

 

 

 

OVERRIDE IN 1

1

14

OVERRIDE IN 2

2

3

OVERRIDE IN 3

3

17

OVERRIDE IN 4

4

6

OVERRIDE IN 5

5

20

OVERRIDE IN 6

6

9

OVERRIDE IN 7

7

23

OVERRIDE IN 8

8

12

 

 

 

MUTE IN 1

1

2

MUTE IN 2

2

16

MUTE IN 3

3

5

MUTE IN 4

4

19

MUTE IN 5

5

8

MUTE IN 6

6

22

MUTE IN 7

7

11

MUTE IN 8

8

25

 

 

 

Logic Ground

all

13

 

 

 

10

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Shure SCM810 manual Advanced Functions, Logic Connection Specifications, Logic Function Input Connector Pin No
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SCM810 specifications

The Shure SCM810 is a state-of-the-art automatic mixer designed for audio professionals seeking precision and reliability in various environments such as live events, broadcasting, and recording studios. This mixer is an integral part of speech reinforcement and meeting applications, providing seamless integration of multiple microphones while ensuring clarity and minimizing feedback.

One of the defining features of the SCM810 is its automatic mixing technology. It employs an advanced algorithm that intelligently manages microphone levels. Instead of manually adjusting levels for each microphone, the SCM810 automatically reduces the gain of inactive mics while boosting those in use. This results in improved sound quality and prevents unwanted noise interference, allowing for a professional audio experience.

The SCM810 supports up to eight microphones, making it versatile enough for panel discussions, roundtable meetings, or larger conferences. In addition to its mixing capabilities, the device boasts a unique "automatic gain control" system that maintains consistent audio levels regardless of the number of active microphones. This ensures that the audience receives a balanced sound across the room without sudden volume fluctuations.

Another notable characteristic of the SCM810 is its low noise operation. The mixer features high-quality preamps that reduce self-noise, providing clear audio reproduction. This is particularly important in environments where clarity is paramount, such as in broadcast applications. The device also includes individual channel gain controls, allowing audio engineers to fine-tune levels to suit specific needs.

In terms of connectivity, the SCM810 features balanced XLR inputs and outputs, ensuring compatibility with a wide range of professional audio equipment. Additionally, it is equipped with a built-in signal processing capability, including a 3-band EQ per channel, which allows for further customization of the audio signal.

Robust and reliable, the Shure SCM810 is built with durability in mind, making it suitable for both permanent installations and portable setups. Its intuitive front-panel controls simplify operation, ensuring that even less experienced users can achieve high-quality audio without extensive training.

In summary, the Shure SCM810 automatic mixer stands out in a crowded market with its advanced automatic mixing algorithms, low noise operation, versatile connectivity, and durable construction. It's an essential tool for anyone requiring dependable, high-fidelity audio control in diverse applications, helping to elevate the audio experience to a professional standard.
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