User's Manual

ECLIPSE INSTALLATION MANUAL
Installing a Coupler
Refer to:
l Coupler Overview on page 45
l Coupler Installation Procedure on page 45
l Unused and Disconnected Coupler Ports on page 47
Coupler Overview
Couplers for protected hot-standby operation are available for equal loss or unequal
loss.
l For equal loss the attenuation per side is nominally 3.5 dB (3.5 / 3.5 dB),
which applies to both the transmit and receive directions, meaning the
additional total one-way attenuation compared to a non-protected link is 7
dB.
l For unequal loss the attenuation is nominally 1.5/6.5 dB.
When using a coupler to combine two ODUs onto a single polarization, the operating
channels must be chosen from within the same diplexer option. If the two ODUs are
not from the same tuning/diplexer option then interference may occur, resulting in
degraded link performance.
For information on unequal coupler (combiner) rati onale refer
to the Best P ractices Guide.
5.8 GHz coupler waveguide flanges have a UAR70 6 hole (IEC) pattern flange on the
ODU ports and UDR on the antenna-facing port.
Coupler Installation Procedure
A coupler instal lati on gui de is included with each coupler.
The following procedure summarizes installation of a direct-mounted coupler. A
coupler may also be remote-mounted, with a single flexible waveguide used to con-
nect the coupler to its antenna.
Attaching a Direct-Mounted Coupler
Before installing a coupler check there will be sufficient mechanical clearance for the
coupler and its ODUs. There should be no clearance issues using Aviat Networks’
approved antennas when installed correctly on its mount with the appropriate left or
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