Troubleshooting - Shure UHF-R UR2 User Manual

Troubleshooting

No sound
Faint Sound or Distortion
Lack of range, unwanted noise bursts, or drop outs
Cannot turn transmitter off or change frequency settings, or can't program receiver
Excessive hum or buzzing
Power
Make sure that the transmitter and receiver are receiving sufficient voltage. The
receiver requires at least 90 Vac. Check the battery indicator on the transmitter and
replace battery if necessary.
Gain
Adjust the transmitter gain and sensitivity settings or the receiver output level, or
toggle the mic/line switch on the back of the receiver.
Cables
Check that all cables and connectors are in working order.
Ground Lift
Lifting the ground on pin 1 of the XLR output on the receiver can sometimes remove
hum or buzz in the audio signal. Set the GND/LIFT switch on the receiver to LIFT if
you are using the XLR connector.
Interface Locks
Both the transmitter and receiver can be locked to prevent accidental changes. On
transmitters, look for a lock symbol on the LCD and use the key combinations to turn
it off.
Increasing Range
If the transmitter is more than 6 to 60 m (20 to 200 ft) from the receiver antenna, you
may be able to increase range by doing one of the following:
• Reduce interference (see above)
• Increase transmitter RF power level.
• Use an active directional antenna, antenna distribution system, or other
antenna accessory to increase RF range.
English
Issue
Power, Cables, or RF
Gain
RF
Interface Locks
Ground lift
Radio Frequency (RF)
Using the RF LEDs
If neither blue RF LED is illuminated, then the receiver is not detecting the presence
of a transmitter.
The amber RF 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. Turn the transmitter off. If more than one or two of the amber RF LEDs
are still illuminated, 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 between systems.
Eliminating RF Overload
If you see the red RF LED on a receiver, reduce the transmitter RF power level or
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.
Compatibility
• Perform a transmitter sync, or make sure 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 (H4, J5, L3, etc...).
Reducing Interference
• Use a different channel or perform an automatic group or channel scan.
• 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 receiver antennas away from metal objects or other sources of
RF interference (such as CD players, computers, digital effects, network
switches, network cables and Personal Stereo Monitor (PSM) wireless
systems).
• Eliminate RF overload.
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