QuickMedia™ Matrix Switcher/Mixer
Crestron
QM-MD7x2
Adjusting the Local Microphone Inputs
Once an MD7x2 is installed and configured, settings for gain, gating level, attack
time, and decay time must be set using the Realtime Mode in Digital Media Tools
(version 3.00.00 or later). Digital Media Tools software can be started from the
SystemBuilder application.
NOTE:
Crestron recommends that you use the latest software to take advantage of
the most recently released features. The latest software is available from the
Downloads | Software Updates section of the Crestron website (
).
Definitions
The MD7x2 allows adjustments to be made to microphone input signals. Following
are definitions of terms that are commonly used when making adjustments to the
MD7x2.
Attack Time
The time it takes (in milliseconds) from when an input signal rises above the gating
level until the microphone output signal is enabled.
Clipping
A condition in which a signal level exceeds the maximum level (the clipping level) a
circuit can handle. This is usually caused by improper gain settings.
Decay Time
The time (in milliseconds) from when an input signal falls below the gating level
until the microphone output signal is muted.
Gain
An adjustable amplification to accommodate varying input signal levels.
Gating
A function that mutes a microphone signal when the input sound level is below a
user-set threshold (Gating Level).
The following diagram demonstrates Clipping, Attack Time, Decay Time, and
Gating level.
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QuickMedia™ Matrix Switcher/Mixer: QM-MD7x2
Operations Guide - DOC. 6273
