Operation, cont’d
The input audio gain or attenuation can be adjusted from the front panel or by using Extron’s
1. | Apply audio signals to all inputs to be adjusted. |
2. | Press and hold the Audio Setup (I/O) button until the Audio Setup LED |
| lights. Release the Audio Setup button. |
3. | Press and release an input button to select an input. The selected input can be |
| adjusted and is tied to output 1 for measurement or monitoring. |
| a. The Output 1 through Output 3 LEDs display the approximate audio |
gain or attenuation for the selected input. The +dB and
• | Each Output 1 through Output 3 LED indicates a range of 6 dB | |
| when lit: | |
| ° | Output 1 LED off = 0 dB to 5 dB |
| ° | Output 1 LED lit = 6 dB to 11 dB |
| ° | Output 1 and 2 LED lit = 12 dB to 17 dB |
| ° | Output 1 through Output 3 LEDs lit = 18 dB |
• | The +dB LED on indicates a positive (gain) level. The | |
| indicates a negative (attenuation) level. Both LEDs on indicate 0 dB. | |
By noting these LEDs’ displays and counting the number of 1 dB steps that you increase or decrease the audio level (step 4 and example 8, step 2a), you can determine the exact input gain or attenuation setting.
b. The Power LED blinks to indicate the adjusted audio level (compared to the internal level,
•When the LED is lit most of the time, blinking off only occasionally, the level is too high.
•When the LED is off most of the time, blinking on (lit) only occasionally, the level is too low.
•When the LED blinks frequently, the level is in the proper range.
c. The 
LED lights steadily when the adjustment is at the minimum level (maximum attenuation, 
LED lights steadily when the adjustment is at the maximum gain (+10 dB).
4. | Press and release the | and | buttons to increase and decrease the audio | |
| level by 1 dB or press and hold the buttons to increase or decrease the level by | |||
| 3 dB per second. The | or | LEDs flash to indicate each 1 dB level change. | |
|
| Each time you press the | or button, wait for the or LED to flash | |
|
| |||
|
| before pushing the button again. Pressing the button too rapidly may not | ||
|
| increment or decrement the audio level. | ||
5. | Press and release the Audio Setup button to save the level value in memory | |||
| and to exit Audio Setup mode. The Audio Setup LED turns off. | |||
• After approximately 30 seconds of front panel inactivity, the switcher saves the most recent input gain or attenuation levels and exits Audio Setup mode.
•There is one audio gain or attenuation setting per input. The setting is shared by the left and right audio inputs.
•The input audio gain or attenuation settings are stored in
