User manual
18
Speaker DS-10/DS-20
Radio range and channels
The receiving antennas are built-in. The range between the units is
around 30 metres. This may vary, however, depending on the particular
environment you are in. Like all radio systems, Comfort Digisystem
communicates on specic channels. If you use two transmitters on the
same channel or a neighbouring one, there may be interference. Other
electronic equipment can also interfere
with the radio transmissions.
In most European countries channels 1-3 may be used (863.250 to
864.750 MHz) for hearing products. However, you should always check
with the frequency assignment authority in your own country as to which
channels are free and which require a licence.
In addition to channels 1-3, under Increased range there are bands A-F,
which are subject to licensing in most European countries:
A 768 - 790 MHz
B 854 - 863 MHz
C 790 - 800 MHz
D 800 - 820 MHz
E 820 - 854 MHz
F 865 - 872 MHz