SUGGESTED LOGIC APPLICATIONS

This section contains suggestions on the uses of the SCM810's logic capa- bilities. Note that uses of these functions are not limited to the listed appli- cations. The user is limited only by individual imagination and creativity. For additional suggestions and solutions to installation problems, contact Shure's Applications Group.

In the following paragraphs, the wiring diagrams refer to the DB-25 connec- tor pins shown in Figure 4.

Cough Button

The talker can turn off his or her microphone during coughing or private conversations by installing an SPST pushbutton switch between the MUTE IN and Logic Ground pins for each channel to be modified (see Figure 12- Channels 1, 2 and 3 modified). When a channel is muted, no audio is passed. (See “Dead Zone on MUTE IN Defeat” in Internal Modifications section for more information on MUTE IN logic.)

LOGIC

GROUND

M1 M3

M2

COUGH BUTTONS

FIGURE 12

Chairperson-Controlled Muting

The chairperson can, by activating a switch, silence all other microphones and be heard without interruption. For operation in this mode, connect all the MUTE IN pins together except that of the chairperson's channel, and wire an SPST pushbutton or toggle switch between those MUTE IN and Logic Ground pins (see Figure 13-the chairperson is shown as Channel 1).

An alternative to a switch is to connect the chairperson's GATE OUT to the MUTE IN of other channels. When the chairperson's microphone activates, all other microphones mute.

CH. 1

LOGIC

GROUND

M3 M5 M7

Remote Channel-On Indicators

Remote indicators can be used to indicate when a talker's microphone is on. Connect the LEDs and a 5-volt supply to the GATE OUT pins as shown in Figure 14 (Channels 1, 2 and 3 shown modified). To avoid switching clicks in the audio output, do not ground the power supply negative terminal in the audio system or rack ground.

IMPORTANT: If a single cable is used for the microphone audio signal and the LED dc power, separate shielded pairs must be used. Failure to carry the dc power on a shielded pair may result in audible clicking due to capac- itive coupling between the dc power lines and microphone lines.

 

+ 5 V POWER –

 

 

 

SUPPLY

 

 

 

 

LOGIC

 

 

 

GROUND

G1

 

G3

 

 

G2

R = 470

&!, 1/4 W

 

 

REMOTE CHANNEL-ON INDICATORS

FIGURE 14

Disabling the Gating Function (Bypass)

To keep certain microphones on at all times, wire the desired microphone channel's OVERRIDE IN pins together to the Logic Ground pin. The selected channels now function as they would in a non-automatic mixer (see Figure 15-Channels 1, 2 and 3 modified).

LOGIC

GROUND

O2

O1 O3

GATING BYPASS

FIGURE 15

M2 M4

M6

CHAIRPERSON-CONTROLLED MUTING

FIGURE 13

11

Page 10 Page 12
Page 11
Image 11
Shure SCM810AZ Suggested Logic Applications, Cough Button, Chairperson-Controlled Muting, Remote Channel-On Indicators
Page 10 Page 12

SCM810AZ specifications

The Shure SCM810AZ is a highly regarded automatic mixer designed specifically for professional audio applications. It is an essential tool for sound reinforcement in situations where multiple audio sources need to be managed efficiently, such as in conference rooms, broadcast environments, and live events.

One of the standout features of the SCM810AZ is its advanced Automatic Mixing technology. This allows the unit to intelligently mix multiple microphones by reducing comb filtering and minimizing background noise. It utilizes an algorithm that automatically detects the level of each input and gradually adjusts its gain to create a balanced output. This results in a cleaner and more intelligible audio feed, ideal for environments with dynamic speaker presence.

The SCM810AZ is equipped with eight input channels, each with individual gain adjustments and the capability to accommodate various types of microphones, from handheld to lavalier. Each channel is designed with a low-cut filter to eliminate unwanted low-frequency noise, improving overall clarity. Additionally, the mixer includes a mic preamp with high headroom, ensuring that even the loudest sources can be captured without distortion.

Another significant characteristic of the SCM810AZ is its intuitive control interface. The front panel features legible LED indicators that provide real-time feedback on levels and activity, allowing users to quickly identify which channels are active. The mixer also includes a comprehensive monitoring section, allowing operators to listen to both individual channels and the overall mix.

In terms of connectivity, the SCM810AZ provides multiple output formats, including balanced XLR and unbalanced 1/4" outputs. This versatility makes it compatible with a variety of audio equipment, ensuring seamless integration into existing setups.

Durability is key in professional audio; thus, the SCM810AZ features a rugged design suitable for both permanent installations and portable use. Its compact form factor allows for easy rack mounting, saving valuable space in equipment setups.

In summary, the Shure SCM810AZ stands out as a professional-grade automatic mixer. With its intelligent automatic mixing technology, robust input options, intuitive interface, and versatile connectivity, the SCM810AZ is an indispensable tool for achieving high-quality audio in any multi-mic environment. Whether used for conferences, broadcasts, or live performances, it delivers consistent and reliable audio performance, meeting the demands of professional sound applications.
Top Page Image Contents