Power; Gain; Cables; Interface Locks - Shure ULX-D Manual

Issue
Cannot turn transmitter off or change frequency settings, or can't pro­
gram receiver
Encryption error message

Power

Make sure that the receiver and transmitter are receiving sufficient voltage. Use the 15 V DC power supply furnished with the
ULXD4 receiver. Check the battery indicators and replace the transmitter batteries if necessary.

Gain

Adjust the system gain on the front of the receiver. Ensure the output level (XLR output only) on the back of the receiver corre­
sponds to the input of the mixing console, amplifier, or DSP.

Cables

Check that all cables and connectors are working correctly.

Interface Locks

The transmitter and the receiver can be locked to prevent accidental or unauthorized changes. A locked feature or button will
produce the Locked screen on the LCD panel.

Encryption Mismatch

Re-sync the receiver and transmitter after enabling or disabling encryption.

Radio Frequency (RF)

RF LEDs
If neither blue RF Diversity LED is illuminated, then the receiver is not detecting the presence of a transmitter.
The amber RF Signal Strength LEDs indicate the amount of signal being received. This signal could be from the transmitter, or
it could be from an interfering source, such as a television broadcast. If more than one or two of the amber RF LEDs are
still illuminated while the transmitter is off, then that channel has too much interference, and you should try a different channel.
The red RF LED indicates RF overload. This will usually not cause a problem unless you are using more than one system at
the same time, in which case, it can cause interference in the other system.
Compatibility
• Perform a Scan and Sync to ensure the transmitter and receiver are set to the same group and channel.
• Look at the label on the transmitter and receiver to make sure they are in the same band (G50, J50, L50, etc...).
Reducing Interference
• Perform a group or channel scan to find the best open frequency. Perform a sync to transfer the setting to the transmitter.
• For multiple systems, check that all systems are set to channels in the same group (systems in different bands do not
need to be set to the same group).
• Maintain a line of sight between transmitter and receiver antennas.
See Solution...
Interface locks
Encryption Mismatch
Shure Incorporated
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