See Solution...
Issue
Power, Cables, Radio
Frequency, or Encryption
Mismatch
No sound
Gain, Cables
Faint sound or distortion
Radio Frequency (RF)
Lack of range, unwanted noise bursts, or
dropouts
Interface Locks
Cannot turn transmitter off or change
frequency settings, or can't program receiver
Encryption Mismatch
Encryption Mismatch message
Firmware Mismatch
Firmware Mismatch message
RF
Antenna Fault Red LED
Power
Make sure that the receiver and transmitter are receiving sufficient voltage.
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
on the back of the receiver corresponds to the mic/line input setting 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 or the lock icon will flash on a transmitter.
Encryption Mismatch
Re-sync all receivers and transmitters after enabling or disabling encryption.
Firmware Mismatch
Paired transmitters and receivers must have the same firmware version in-
stalled to ensure consistent operation. See Firmware topic for firmware update
procedure.
Radio Frequency (RF)
RF LEDs
If neither blue
RF
Diversity LED is illuminated, then the receiver is not detect-
ing the presence of a transmitter.
The orange
RF
Signal Strength LEDs indicate the amount of RF power 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 two of
the orange
RF
LEDs are still illuminated while the transmitter is off, then that
channel may be experiencing interference, and you should try a different
channel.
The red
RF
LED indicates RF overload. Overloads have the potential to
cause interference in multiple system installations. If you are experiencing
an overload, turn off the receiver to see if it is causing interference with other
components.
Compatibility
•
Perform a Scan and Sync to ensure the transmitter and receiver are set
to the same group and channel.
•
Look at the band label on the transmitter and make sure the receiver is
set to the same band.
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.
•
Move or point receiver antennas away from metal objects or other sources
of RF interference (such as LED walls, computers, digital effects, network
switches, network cables and Personal Stereo Monitor (PSM) wireless
systems).
•
Eliminate RF overload (see below).
Increasing Range
If the transmitter is more than 6 to 60 m (20 to 200 ft) from the receiver an-
tenna, you may be able to increase range by doing one of the following:
•
Reduce interference (see above).
•
Increase transmitter RF power level.
•
Use Normal mode instead of High Density mode.
•
Use an active directional antenna, antenna distribution system, or other
antenna accessory to increase RF range.
Eliminating RF Overload
If you see the red RF LED on a receiver, try the following:
•
Reduce the transmitter RF power level
•
Move the transmitter further away from the receiver—at least 6 m (20 ft)
•
If you are using active antennas, reduce antenna or amplifier gain.
•
Use omnidirectional antennas
Antenna Faults
The
Antenna Fault
red LED indicates a short circuit condition or excessive
load at an antenna port.
•
Check antennas and cables for damage
•
Ensure that antenna ports are not overloaded
•
Check antenna bias voltage setting. Turn off voltage if using passive
antennas.
Specifications
SystemSpecifications
RF Carrier Frequency Range
470–960 MHz, varies by region (See Frequency Range and Output Power table)
Shure Incorporated
AD4Q
Digital Quad Receiver
17/21
2017/10/25
