Widex USB LINK, Инструкция пользователя

Страница: 20 / 36

20
reGULAtory
inForMAtion
The following Table summarizes the technical details of the WidexLink technology as it is imple-
mented in the cLEAr™ hearing aids and accessories.
unit uSB Link Hearing aid C4-pA
Type W-link W-link
Antenna type Inductive antenna Inductive antenna
Antenna dimensions Ø6 mm
L – 40mm Ø1.8 mm
L – 4.85mm
modulation FSK FSK
magnetic Field Strength -12dB
μ
A/m
at 10m distance
-54dB
μ
A/m
at 10m distance
output power 5nW EIrp *) 29pW EIrp *)
range <30cm between hearing
aid and Widex USB Link <1m remote unit to
hearing aid.
<30cm between hearing
aids or hearing aid to
Widex Tech module
center frequency 10.6mHz 10.6mHz
channels Single channel radio Single channel radio
Bandwidth 660kHz (-15dB) 660kHz (-15dB)
data rate 212kbit/s raw channel
capacity 212kbit/s raw channel
capacity
data flow Simplex or semiduplex Simplex or semiduplex
protocol random access
– no collision avoidance. random access
– no collision avoidance.
*) EIRP = Equivalent isotropically radiated power