Low Battery Alert; Receiver Gain Adjustment; Audio Signal Encryption - Shure QLX-D Series User Manual

• During storage, check batteries every 6 months and recharge to 40% of capacity as needed

Low Battery Alert

The receiver display can be configured to flash when the battery runtime for a transmitter is less than 30 minutes.
The alert displays the following information based on the type of batteries installed in the transmitter:
• SB900 Battery: The receiver screen flashes, the low battery icon is displayed, and the remaining battery runtime is shown
• AA Batteries: The receiver screen flashes and the low battery icon is displayed
1. Press menu while holding the enter button to access the advanced menu.
2. Use the arrow buttons to navigate to the Alert screen.
3. Select On or Off to enable or disable the alert function.
4. Press the enter button to save.

Receiver Gain Adjustment

The gain control sets the overall signal level for the system. The default gain level is 12 dB and the available gain range is -18
to 42 dB, in 1 dB increments.
Set the gain to a level where the audio LED appears green or yellow, with only the highest audio peaks causing the LED to oc­
casionally turn red and engage the limiter. Reduce the gain if there is audible distortion of the audio.
From the receiver home screen, use the arrow buttons to increase or decrease the gain:
• A single button press adjusts the gain in 1 dB increments
• Press and hold the button for larger adjustments
Test the transmitter at performance levels when adjusting the gain. Monitor the audio meter and the audio LED to prevent over­
loads.

Audio Signal Encryption

The QLX­D receiver features Advanced Encryption Standard (AES­256) to protect the audio signal. When encryption is en­
abled, the receiver generates a unique encryption key which is shared with a the transmitter during an IR sync. Transmitters
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