UHF Wireless Digital Hybrid
TM
Receiver
TROUBLESHOOTING
POWER SUPPLY AND FUSE
LCD display not active or lit.
• External power supply disconnected or
inadequate.
• Main power supply fuse tripped. Turn the
receiver off, remove the cause of the overload
and turn the receiver back on.
• Wrong polarity power source. The external DC
in requires POSITIVE to be on the center pin.
• Battery may be low. Try a fresh battery
PILOT TONE SQUELCH
PILOT indicator is solid “P”, but no sound
• Audio output cable bad or disconnected.
• Audio Output level set too low. Use the built-in
test tone to verify levels.
PILOT “P” keeps flashing when transmitter audio
switch is turned on
• Pilot tone detection can take several seconds.
Turn on the transmitter power (and the audio
switch on some models) and wait 3 to 5
seconds for the “P” to indicate steadily.
• Transmitter and receiver not on same
frequency.
Noise on audio and Pilot indicator is “b”.
• The pilot tone bypass has been activated. Hold
MENU and press UP to reset (works only from
the Main Window).
NOTE:
The PILOT indicator on the front panel shows as a solid
“P” to indicate that the audio has been turned on at the
transmitter, and that the audio output on the receiver is
enabled. When the “P” is on, the audio is enabled. If the
“P” is flashing the pilot tone is not detected and the audio
will be muted (squelched).
When the pilot tone is bypassed, the “P” icon changes to
a “b” shape.
ANTENNAS AND RF SIGNAL STRENGTH
RF Level is weak.
• Receiver may need to be moved or reoriented.
• Antenna on transmitter may be defective or
poorly connected - double check antenna on
transmitter.
• Improper length of antenna, or wrong antenna
on transmitter or receiver. UHF whip antennas
are generally about 3 to 5 inches long. UHF
helical antennas may be shorter, but are often
less efficient.
No RF Signal
•
Make certain frequency switches on transmitter
match the receiver frequency setting.
•
Check battery in transmitter
AUDIO SIGNAL QUALITY
Poor signal to noise ratio
•
Transmitter gain set too low
• The noise may not be in the wireless system.
Turn the transmitter audio gain all the way
down and see if the noise remains. If the noise
remains, then turn the power off at the
transmitter and see if it remains. If the noise is
still present, then the problem is not in the
transmitter.
• If noise is still present when the transmitter is
turned off, try lowering the audio output level
on the UCR411 and see if the noise lowers
correspondingly. If the noise remains, the
problem is not in the receiver.
• Receiver output is too low for the input of the
device it is feeding. Try increasing the output
level of the UCR411 and lowering the input
gain on the device the UCR411 is feeding.
Distortion
• Transmitter input gain too high. Check and/or
readjust input gain on transmitter according to
the LEDs on the transmitter and then verify the
setting with the audio meter in the main window.
• Audio output level too high for the device the
UCR411 is feeding. Lower the output level of
the UCR411.
Rio Rancho, NM – USA
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