Williams Sound
®
Helping People Hear
9
H
INTS FOR
U
SING THE
S
YSTEM
Normal operating distance between the transmitter and receiver is about 30 meters. The
operating range will vary in different buildings and surroundings. In some locations, the
signal may momentarily disappear. This is called a “drop-out” and is due to reflection and
cancellation of the radio signal. Moving a few feet will restore the signal.
Keep the transmitter and receiver units at least a meter apart. If the transmitter gets too close
to a receiver, it can overload the receiver, causing noisy reception or blocking of the signal.
Do not use more than one transmitter on the same channel (frequency) at the same time
unless they are physically separated by more than 30 meters. Operating more than one
transmitter on the same channel at the same time in the same place will result in interference.
U
SING
M
ULTIPLE
S
YSTEMS FOR
M
ULTIPLE
G
ROUPS
:
For multiple tour groups within the same facility, multiple Tour Guide Systems may be
operated on the same channel at the same time by maintaining physical separation of 30
meters between groups. The physical separation of groups takes advantage of the FM capture
effect which causes receivers to lock onto the closest transmitter.
Tour Group 1
Channel A
30 Meters
Tour Group 2
Channel A
F
IGURE
4: T
OUR
G
UIDE
G
ROUP
S
EPARATION
