User Manual

Table Of Contents
Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 13 (86)
A laser system with two colors can operate one repeater for each fibre optic converter in a OMU-Repeater
system – one color is used for the uplink and one for the downlink. A laser system with three or more
colors can operate two or more repeaters per fibre optic converter. One color is used for the downlink
which is the same for all repeaters, and in the uplink each repeater has its own color.
The connection from one repeater to the next is done via so called add-drop couplers. The difference in
distance between the repeaters and the OMU can be compensated for automatically.
Add-drop
Coupler
Slave 1
Slave 2
OMU
1310
1550
1510
Two repeaters are connected to the same converter in the OMU via the same fibre but the wavelength for the
uplink differs between the units. Slave 1: 1550 ± 3 nm, Slave 2: 1510 ± 3 nm. The downlink signal is the same
for both repeaters.