Lectrosonics SRb_SRb5P - Manual (Page 23)

UHF Digital Hybrid Wireless ®
Rio Rancho, NM 23
Troubleshooting
Symptom Possible Cause
INITIAL POWER ON
LCD display not active or lit
External power supply disconnected or inadequate.
Wrong polarity power source. The external power input jack requires
POSITIVE (+) to be on the center pin. Battery gets warm and doesn’t
work.
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 RF signal is present that is not
centered on the channel, and the audio is likely to be distorted.
There are three principal causes:
1) The transmitter is set to the wrong channel, but close to the
the correct channel. Check frequency setting of transmitter.
2) A foreign signal is causing the condition, such as from a local
TV station or from intermodulation from another transmitter.
Retune the receiver and transmitter to a clear frequency.
3) The transmitter carrier frequency is not correct (rare occurrence).
Contact factory for repair.
If any of these solutions don’t remove the warning message, the
transmitter or receiver may need repair.
PILOT TONE SQUELCH
Pilot Tone indicator (P) present, but no sound (Check audio meter first)
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 Selections from Main Window, COMPAT Window.)
Noise on audio and Pilot Tone Indicator is “b”
The pilot tone bypass has been activated. Hold SEL 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 Digital Hybrid, 200 Series, IFB Mode and Mode 6 compatibility modes, the PILOT indicator on the LCD 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 tone bypass” causes a lowercase “b” to appear on the LCD
main window and forcing the squelch to open and deliver audio. When no matching transmitter is turned on, loud noise
will be present at the receiver output.