Lectrosonics R400 - Manual (Page 20)

R400
Symptom Solution
No RF Signal Make certain frequency switches on transmitter match the receiver
frequency setting.
Check battery in transmitter.
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 R400 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 R400 and lowering the input
gain on the device the R400 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 R400 is feeding. Lower
the output level of the R400.
Bad frequency response or generally
poor audio quality
Ensure the receiver is set to the compatibility mode that matches
the transmitter in use.
Note
A number of symptoms may be caused by a strong interfering signal on the same frequency. Use the R400 Scan function to verify the
transmitter and receiver are operating on a clear frequency channel.
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