Adjusting The Qm-Ftcc Microphone Inputs - Crestron QM-FTCC Operations & Installation Manual

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28 • QuickMedia™ FlipTop Computer Center: QM-FTCC

Adjusting the QM-FTCC Microphone Inputs

Once a QM-FTCC is installed and configured, settings for gain, gating level, attack
time and decay time should be set using the SystemBuilder finish tab.
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 Crestron
website.
Definitions
The QM-FTCC allows adjustments of the microphone input signals. The following
are definitions of terms that are commonly used when making adjustments.
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
An overload condition that occurs when signal level exceeds the maximum level a
circuit can process. This is usually caused by excessive 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 amplification adjustment designed to accommodate varying input signal levels.
Gating
Gating is a function that mutes a microphone signal when the input sound level is
below a user-set threshold (gating level).
The following diagram demonstrates attack time, clipping, decay time and gating
level.
Crestron QM-FTCC
Operations & Installation Guide – DOC. 6313B