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Precis SD Control Panel Operation
42
Precis SD Instruction Manual
Adjusting Digital Input Gain
If your system has digital input gain control, adjustments (within the gain range for the specific audio
inputs) 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.
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 of the input gain adjustments that were just
entered.
FIG. 22 Audio adjustments keys (dual-labeled keys can adjust audio)
Returns system to Switch Mode
Places system in
Volume Adjust Mode
Dual-labeled keys
adjust audio