Lectrosonics UH400 Operating Instructions And Troubleshooting Manual page 9

SYMPTOM
RECEIVER RF LAMP OFF
NO SOUND (OR LOW SOUND LEVEL),
RECEIVER MOD LEVEL LEDs ARE ON
NO SOUND (OR LOW SOUND LEVEL),
RECEIVER MOD LEDs ARE OFF
DISTORTED SOUND
HISS AND NOISE – AUDIBLE DROPOUTS
EXCESSIVE FEEDBACK
POSSIBLE CAUSE
1. Transmitter not turned on.
2. Transmitter battery is dead.
3. Receiver antenna missing or improperly positioned.
4. Transmitter and receiver not on same frequency. Check switches/
display on transmitter and receiver.
5. Operating range is too great.
1. Receiver output level set too low.
2. Receiver output is disconnected; cable is defective or mis-wired.
3. Sound system input is turned down.
1. Transmitter gain (audio level) set too low.
2. Faulty microphone
3. Phantom power not enabled for mic that requires it.
1. Transmitter gain (audio level) is far too high.
lamps on transmitter and receiver as it is being used. (Refer to
the Operating Instructions section for details on gain adjustment)
2. Receiver output may be mismatched with the sound system or
recorder input. Adjust output level on receiver to the correct level
for the recorder, mixer or sound system.
3. Excessive wind noise or breath "pops."
and/or use a larger windscreen.
4. Transmitter is not set to same frequency as receiver. Check that
frequency select switches on receiver and transmitter match.
1. Transmitter gain (audio level) far too low.
2. Receiver antenna missing or obstructed.
3. Operating range too great.
1. Transmitter gain (audio level) too high causing the limiter to reduce
the dynamic range which in turn causes feedback. Check gain
adjustment and/or reduce receiver output level. (Refer to the
Operating Instructions section for details on gain adjustment)
2. Transmitter too close to speaker system.
3. Mic is too far from user's mouth.
Rio Rancho, NM – USA
Frequency Agile Plug-on UHF Transmitter
Reposition microphone
Check mod level
9