Widex TV-DEX - Page 43

Center
frequency
10.6MHz 2.45GHz ISM 2.45GHz ISM 10.6MHz
Channels Single channel
radio
17 logical
channels
17 logical
channels
Single channel
radio
Bandwidth 660kHz
(-15dB)
2 MHz 2 MHz 660kHz (-15dB)
Data rate 212kbit/s raw
channel
capacity
2 Mbit/s 2 Mbit/s 212kbit/s raw
channel
capacity
Data flow Simplex Time division
duplex (TDD)
Time division
duplex (TDD)
Simplex or
semi duplex
Protocol Random
access – no
collision
avoidance.
Packet based
protocol, time
divided.
Packet based
protocol, time
divided.
Random access
– no collision
avoidance.
* EIRP = Equivalent isotropically radiated power.
(Benefits)Theuseofwirelesstransmissionallowsconvenientandsynchro-
nizedcontrolofhearingaidfunctionsThewirelesshearingaidsshareinput
informationbetweenthetwopartnerhearingaidsInsodoingthewearers
wouldexperiencethefollowingadditionaluserbenefits(onlywhenwearing
binauralhearingaids)
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