Receiver Gain Adjustment; System Setup - Shure QLX-D Series Manual

QLX-D Wireless System

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 occasionally 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 overloads.
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Audio Signal Encryption
The QLX-D receiver features Advanced Encryption Standard (AES-256) to
protect the audio signal. When encryption is enabled, the receiver generates
a unique encryption key which is shared with a the transmitter during an IR
sync. Transmitters and receivers that share an encryption key form a protected
audio path, preventing unauthorized access by other receivers. To maintain
security, components remain encrypted when turned off and on.
Creating an Encrypted Audio Channel
1. Press the menu button to navigate to the encryption menu, indicated by
the key icon.
2. Use the arrow buttons to select an encryption option:
⁃ on = encryption enabled
⁃ OFF = encryption disabled
3. Press enter to save. The key icon will be shown on the receiver display.
System Set Up
Creating Audio Channels
A wireless audio channel is formed when a receiver and transmitter are tuned
to the same frequency. To ease setup, frequencies available to the QLX-D
system are organized into groups and channels. Each group contains a
number of channels, and each channel is assigned to a specific preset fre-
quency.
The QLX-D system provides 3 methods for tuning the receiver and transmitter
to the same frequency:
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MHz
dB
audio gain
4. Press the sync button and align the IR sync windows of the transmitter
and receiver. The encryption key icon will appear on the transmitter
screen when the IR sync is complete and the encryption key has been
transferred from the receiver.
Additional transmitters can share the same encryption key with a single re-
ceiver. Perform an IR sync to encrypt each additional transmitter.
Note: When OFF is selected to disable encryption, perform an IR sync to
clear the encryption key from the transmitter and prevent an encryption mis-
match error or FAIL message.
< 15 cm (6 in.)
Removing Encryption
1. Press the menu button to navigate to the encryption menu.
2. Select OFF.
3. Press enter to save.
4. IR sync the transmitter and receiver to clear the encryption key from the
transmitter and prevent an encryption key mismatch between compo-
nents, indicated by a FAIL message.
Note: If encryption has been set from off to on, the receiver will generate a
new encryption key and must be IR synced to the transmitter to share the
new key.
• Scan and IR Sync: The receiver scans the RF spectrum for the best
available frequency and an IR sync automatically tunes the transmitter
to the receiver frequency
• Manual Group and Channel Assignment: Manually setting the receiver
and transmitter to the same group and channel number forms an audio
channel
• Manual Frequency Assignment: Manually setting the receiver and
transmitter to the same frequency rather than using groups and channels
forms an audio channel
Shure Incorporated
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