Troubleshooting; If A Problem Occurs - Sennheiser EvolutionWireless EW 300 Series Instruction Manual

Cleaning the devices

If a problem occurs ...

EM 300
Problem
Receiver cannot be oper-
ated, "Locked" appears
on the display panel
No operation indication
No RF signal
RF signal available,
no audio signal,
"MUTE" appears on the
display panel
Audio signal has a high
level of background noise
Audio signal is distorted
No access to a certain
channel
None of the diversity
displays I or II appears on
the display panel
During the soundcheck,
only one diversity display
(I or II) appears on the
display panel
30
Possible cause
Lock mode is activated
No mains connection
Transmitter and receiver are not on the
same channel
Transmitter is out of range
If "TX Mute" additionally appears on the
display panel:
transmitter is muted ("MUTE")
or
transmitter doesn't transmit a pilot tone
Receiver's squelch threshold is adjusted
too high
Transmitter sensitivity is adjusted too
low/high
Transmitter sensitivity is adjusted too
high
Receiver's audio output level is adjusted
too high
During scanning, an RF signal has been
detected on this channel and the channel
has been locked
During scanning, a transmitter of your
system operating on this channel has
not been switched off
Receiver's squelch threshold is adjusted
too high
Transmitter's RF signal is too weak
Antennas are not connected correctly
One of the antennas is not connected
correctly
Antennas are not optimally positioned
Possible solution
Deactivate the lock mode
(see page 21).
Check the connections of the mains unit.
Set the transmitter and receiver to the same
channel. To do so, use the synchronization
function (see page 21).
Check the squelch threshold setting
(see page 26).
Reduce the distance between transmitter and
receiving antennas.
Cancel the muting (see page 22).
Switch the pilot tone transmission on the
transmitter on (see page 28).
Switch the pilot tone evaluation on the receiver
off (see page 27).
Reduce the squelch threshold (see page 26).
Reposition the antennas.
Adjust the transmitter sensitivity correctly
("Sensitivity", see page 28).
Adjust the transmitter sensitivity correctly
("Sensitivity", see page 28).
Reduce the audio output level
("AF Out", see page 26).
Set the transmitter operating on this channel
to a different channel and redo the frequency
preset scan (see page 26).
Switch the transmitter off and redo the
frequency preset scan (see page 26).
Reduce the squelch threshold
(see page 25).
Increase the transmission power of the
transmitter.
Reduce the distance between transmitter and
receiver.
Check the antenna cables or the antennas.
Check the antenna cable or the antenna.
Reposition the antennas.