User's Manual

UHF Digital Hybrid Wireless™ Receiver
Rio Rancho, NM
23
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