AMX Precis HT, Instruction Manual

Page: 48 / 65

Control Panel Operation
42 Precis HT Instruction Manual
Adjusting Digital Input Gain
Digital input gain control adjustment (within the gain range for the specific audio inputs) for the analog
audio signals can be made at any time during normal operation. When audio is adjusted for a device on
one level containing audio, the adjustment remains in effect for that device on all levels switching that
same type of audio signals.
Caution: We strongly recommend that digital input gain adjustments be made only by a
qualified dealer or installer.
Purpose & Uses of Input Gain
The purpose of controlling input gain (the nominal level of the signal from the source device) is to allow
source signals of various amplitudes to be equalized before they are routed and the volume is adjusted.
Equalizing source levels provides a consistent reference for volume adjustments and eliminates jumps
when routing a new source to a destination.
Typical uses for input gain include switching consumer and professional grade audio equipment (whose
levels can vary noticeably) in the same matrix switcher. Input gain adjustment is also used for equalizing
amplitudes between balanced and unbalanced sources.
To adjust digital input gain to equalize input levels:
1.
Route an input to the first output.
2.
Adjust the digital input gain for the input to a specific dB level (see instructions below).
3. Repeat for all inputs that will be routed to the same output.
To adjust digital input gain:
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 Input Key to select the input that needs digital input gain adjustment.
The selected Input Key illuminates, along with the Up Arrow (Macro) and Down Arrow (Lock)
Keys.
4.
Press and release the Up Arrow Key to increase the digital input gain.
Or
Press and release the Down Arrow Key to decrease the digital input gain.
The pressed key flashes and then stays illuminated.
5. Repeat Step 4 until the desired input gain level is reached.
6. Press the Cancel Key to return to the Switch mode.
Note: Pressing the Cancel Key does not cancel any input gain adjustments that were just entered
.
Dual-labeled keys adjust audio for analog audio
Places system in Volume Adjust mode
Returns system to Switch Mode
FIG. 24
Audio adjustment keys (dual-labeled keys can adjust audio)