AMX Distribution Matrix Precis SD - Manual (Page 46)

Precis SD Control Panel Operation
41 Precis SD Instruction Manual
Adjusting Audio
Some Precis SD systems offer optional volume control and digital input gain adjustment features. If your
system supports audio adjustments, output volume or digital input gain can be adjusted using either the
control panel or BCS commands sent through a serial controller. (For information on audio adjustment
using BCS commands, see the BCS Protocol Instruction Manual.)
Note: The status of audio signals can be checked only from an external serial controller via BCS
commands.
When volume or digital input gain is adjusted for a device on one level, the adjustment remains in effect
for that device on all levels switching audio signals.
Important: For AMX AutoPatch systems, the total through-system gain (the amount of input gain
plus the amount of output gain) specified for any input/output routing path cannot exceed 10 dBr.
If you enter a volume (gain) command that exceeds 10 dBr when it is combined with the gain of
an input, the command will be accepted (and will be indicated in status results) but will not result in
an audible difference of more than 10 dBr.
Adjusting Output Volume
If your system has volume control, adjustments (within the volume range for the specific audio output
connectors) can be made at any time during normal operation. When audio is adjusted for a device on
one level, the adjustment remains in effect for that device on all levels switching audio signals.
The Control Panel must be in Switch Mode to make audio adjustments. Follow the steps below to adjust
the output volume. Each press of an arrow key increases or decreases output volume by 1 dB if the
volume is below -30 dBu, and by 0.5 dB if the volume is above -30 dBu.
You can return to Switch mode at any time by pressing the Cancel Key.
To adjust output volume:
1. Press the Cancel Key to put the panel into Switch mode.
All the control panel lights turn off.
2. Press and hold the Volume Adjust Key for at least 2 seconds.
The Volume Adjust Key illuminates and then flashes.
The control panel is in Volume Adjust mode.
3. Press an Output Key to select the output that needs volume adjustment.
The selected Output Key illuminates, along with the Up Arrow (Macro) and Down Arrow (Lock)
Keys.
4. Press and release the Up Arrow (Macro) Key to increase the volume.
Or
Press and release the Down Arrow (Lock) Key to decrease the volume.
The pressed key flashes and then stays illuminated.
5. Repeat Step 4 until the desired volume level is reached.
6. Press the Cancel Key to return to the Switch mode.
Note: Pressing the Cancel Key does not cancel the volume adjustments that were just entered
FIG. 21 Audio adjustment keys (dual-labeled keys can adjust audio)
Returns system to Switch Mode
Places system in
Volume Adjust Mode
Dual-labeled keys
adjust audio