Lectrosonics DSR4 - Troubleshooting; INITIAL POWER ON; RF Level Issues; Audio Signal Quality

DSR4
LECTROSONICS, INC.
24
Symptom Possible Cause
INITIAL POWER ON
Display not active or lit. External power supply disconnected or inadequate.
Main power supply fuse tripped. Turn the receiver o, 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.
Display has timed out. Press any button to revive.
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 ecient.
No RF Signal Make certain frequency settings on transmitter match the receiver
frequency settings.
Ensure transmitter is in transmit mode.
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 o 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 o, try lowering
the audio output level on the DSR4 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 DSR4.
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 DSR4 is feeding.
Lower the output level of the DSR4.
Bad frequency response or
generally poor audio quality.
Ensure the receiver is set to the compatibility mode that matches
the transmitter in use.
DISPLAY NOT ACTIVE OR LIT Ensure that the unit has the correct power supply and is connected.
Troubleshooting