Lectrosonics UCR411a User Manual download pdf (Page 23)

UHF Digital Hybrid Wireless™ Receiver

Rio Rancho, NM

Symptom Possible Cause

INITIAL POWER ON

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.

Version message shows DSP or COM. This indicates an internal error. Please contact the factory for

assistance.

Display indicates CHECK FREQ. This is a warning that a strong signal is present but it’s far enough

away from the center of the channel that the audio is likely to be

distorted. Try relocating to unused frequencies.

If this doesn’t remove the warning message, the transmitter or

receiver may need repair.

PILOT TONE SQUELCH

Pilot Tone indicator (P) present, but no sound

Audio output cable bad or disconnected.

Audio Output level too low. Use the built-in test tone to verify levels.

Pilot Tone Indicator (P) keeps ﬂashing when transmitter 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.

Receiver compatibility mode does not match the transmitter in use.

(See Menu Selections from Main Window, COMPAT Window.)

Noise on audio and Pilot Tone Indicator is “b”.

The pilot tone bypass has been activated. Hold MENU and press UP

to reset (works only from the Main Window).

Pilot Tone Indicator not present but receiving audio

Receiver is set to a compatibility mode that doesn’t use Pilot Tone.

Check that receiver compatibility mode matches the transmitter in use

as any sufﬁciently strong signal can unsquelch the receiver in this

mode, compatible or not.

NOTE: In the 400 Series and 200 Series compatibility modes, 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).

In the other compatibility modes, no pilot tone is used and the “P” is never displayed. Audio is present whenever the

receiver detects a sufﬁciently strong signal.

Regardless of the compatibility mode, activating the “pilot bypass” function causes a lowercase “b” to appear in the pilot

indicator position on the main window and forcibly unsquelches the audio.

Troubleshooting

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Lectrosonics UCR411a User Manual Page 23

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