Sony UWP-D21 Operating Instructions Manual page 35

Symptom Cause
The attenuator cannot The GAIN MODE menu is set to AUTO GAIN, or
be set. the INPUT LEVEL menu is set to LINE.
There is sound The channel setting on the transmitter is different
interruption or noise. from that on the tuner.
Two or more transmitters are set to the same
channel.
The transmitters are not set to the channels within
the same channel group.
Adjacent channels are being used.
The RF indicator on Jamming radio waves are being received.
the tuner lights up
even when the
transmitter is off.
The transmitter The infrared receptor on the transmitter is too far
channel cannot be set from the infrared transmission port on the tuner.
with infrared
1)
transmission.
Interference from infrared communications
between other devices or from direct sunlight is
present.
The transmitter The N-Marks of both units are not facing each
channel cannot be set other, or they are too far apart. Or there may be
via NFC some metallic object between the N-Marks.
communication.
The grip is open.
1) Body-pack transmitter (UTX-B40) / hand-held microphone (UTX-M40) / plug-on transmitter (UTX-P40) only
2) Body-pack transmitter (UTX-B40) / plug-on transmitter (UTX-P40) only
3) Portable diversity tuner (URX-P40) only
4) Body-pack transmitter (UTX-B40) / portable diversity tuner (URX-P40) only
5) Body-pack transmitter (UTX-B40) / plug-on transmitter (UTX-P40) / portable diversity tuner (URX-P40) only
6) Hand-held microphone (UTX-M40) only
6)
35
Solution
Change the GAIN MODE menu and INPUT
LEVEL menu settings.
Use the same channel setting on both the
transmitter and tuner.
Two or more transmitters cannot be used on the
same channel. Refer to the frequency list stored
on the supplied CD-ROM, and reconfigure the
channel on each transmitter.
The channel plan is set so that no signal
interference occurs when two or more transmitters
are used simultaneously. Set each transmitter to a
different channel within the same channel group.
Use the channels separated by at least two
channels (250 kHz).
Set the channel on the tuner to a channel for
which the RF indicator does not light, or use the
Clear Channel Scan function to switch to a
channel without interference. Then, set the
transmitter to the same channel as the tuner.
If using two or more transmitters, change to a
channel group that is not affected.
Reduce the distance between the infrared
receptor on the transmitter and the infrared
transmission port on the tuner to within about
20 cm (8 in.).
The transmitting distance is reduced when
interference from strong sunlight, for example, is
present. Place the transmitter and tuner as close
to each other as possible.
Place the N-Marks approximately 5 mm from each
other. Make sure there are no metallic or other
objects near them.