Adjusting Input Audio Gain and Attenuation

Switchers have input audio gain and attenuation adjustments. In Audio Setup mode, the audio level of each input can be adjusted through a range of –18 dB to +10 dB. This adjustment range ensures that there is no noticeable volume difference among sources. It also eliminates the need for separate preamps or attenuators when used with professional (higher line level) and consumer (lower line level) audio equipment (see figure 12).

dBu

dBv

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

dBu

dBv

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+10

+8

+10

+8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+7

+5

+7

+5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+4

+2

+4

+2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+1

-1

+1

-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-2

-4

-2

-3

 

 

 

Laptop

 

 

 

 

 

 

 

 

 

 

 

 

-5

-7

-5

-7

Audio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-8

-10

-8

-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-12

-14

-12

-14

Inputs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-18

-20

-18

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output

Low Audio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level

Output Level

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MVX SERIES

 

 

 

 

 

INPUTS

 

 

 

 

 

 

 

OUTPUTS

 

 

 

 

 

VGA/AUDIO MATRIX SWITCHER

 

 

 

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

ENTER

PRESET

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VID +dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUD -dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUDIO SETUP

 

 

 

Audio

 

MVX VGA A Series Switcher

Audio System

 

 

 

 

 

dBu

dBv

Inputs

 

 

 

+10

+8

 

 

 

No noticeable volume

+7

+5

 

 

 

+1

-1

VIDEO INPUT

differences between sources

+4

+2

DAV101CM

VGA LINE DRIVER

 

 

 

 

 

POWER

 

 

-2

-3

 

 

 

 

-5

-7

DAS101 CM

 

-8

-10

 

-12

-14

 

 

 

 

-18

-20

 

 

 

 

High Audio

Output Level

Computer

Figure 12. Audio Gain and Attenuation

In Audio Setup mode, the input that is selected for adjustment is automatically tied to output 1. Connect a VU meter or an audio system to output 1 to measure or monitor the audio while you perform adjustments.

There are two ways to measure the audio level during audio setup:

•Monitor the input audio level indicator (Power LED) on the front panel.

•Connect a VU meter to output 1 and, if necessary, temporarily set the output 1 level to the consumer (-10 dBV) level (see the Audio output level SIS commands in the “Remote Operation” section).

The input audio gain or attenuation can be adjusted from the front panel or by using the Extron Matrix Switchers Control Program or the SIS.

1.Apply audio signals to all inputs to be adjusted.

2.Press and hold the Audio Setup (I/O) button until the Audio Setup LED lights. Release the Audio Setup button.

3.Press and release an input button to select an input. The selected input can be adjusted and is tied to output 1 for measurement or monitoring.

a.The Output 1 through Output 3 LEDs display the approximate audio gain or attenuation for the selected input. The +dB and –dB LEDs display the polarity (+ [gain] or – [attenuation]).

• Each Output 1 through Output 3 LED indicates a range of 6 dB when lit:

• Output 1

LED off = 0 dB to 5 dB

 

1

2

3

 

 

 

0 – 5 db

 

 

• Output 1

LED lit = 6 dB to 11 dB

6

– 11 db

 

 

• Output 1 and 2 LED lit = 12 dB to 17 dB

12

– 17 db

 

 

 

18 db

 

 

 

 

 

 

 

• Output 1 through Output 3 LEDs lit = 18 dB

•The +dB LED on indicates a positive (gain) level. The –dB LED on indicates a negative (attenuation) level. Both LEDs on indicate 0 dB.

MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Operation 23

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Extron electronic MVX 44, MVX 88, MVX 84, 48 manual Adjusting Input Audio Gain and Attenuation
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48, MVX 84, MVX 44, MVX 88 specifications

Extron Electronics is a prominent leader in high-quality AV technology solutions, renowned for its innovative product lines designed to address diverse connectivity and distribution needs. Among their array of offerings, the MVX series stands out, particularly the MVX 44, MVX 84, and MVX 88 models, which cater to various AV signal routing needs within educational institutions, corporate environments, and large spaces.

The Extron MVX 44 is a 4x4 matrix switcher designed for routing HDMI, VGA, and audio signals. One of its key features is its ability to deliver high-resolution video up to 1080p, making it ideal for modern multimedia presentations. The MVX 44 supports EDID management, ensures compatibility with a range of source devices, and features automatic switching capabilities. It also includes a user-friendly interface for seamless operation, allowing simultaneous switching of multiple input sources to multiple outputs.

Expanding on the capabilities of the MVX 44, the MVX 84 and MVX 88 models provide enhanced functionality with additional inputs and outputs. The MVX 84 offers support for up to 8 input sources and 4 output destinations, while the MVX 88 offers 8x8 routing of signals. Both models maintain superior video quality and high-performance signal processing, accommodating more extensive AV systems. They also share features such as HDCP compliance to secure content protection, ensuring that the highest quality video signals are transmitted without degradation.

Technologically advanced, these switchers incorporate Extron's exclusive technologies, such as the Advanced Color Processing for superior color fidelity and signal reliability. Additionally, the Series comes equipped with optional control and integration capabilities, enabling connection to various AV control systems for centralized management.

The Extron MVX series matrices are built with the robustness expected from Extron products, ensuring long-term reliability in demanding environments. The integration of state-of-the-art support for audio signals allows not only video but also audio distribution, making them versatile for any AV setup. In summary, with their rich feature set, impressive scalability, and superior video processing capabilities, the Extron MVX 44, MVX 84, and MVX 88 present compelling solutions for anyone looking to streamline AV signal management in professional setups.
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