User Manual
Axell Wireless Limited
Technical Literature
L.A. M.T.A. Remote Sites
Document Number 80-301401HBKM Issue No. 1 Date 13/06/2008 Page 90 of 148
4.6.5. Downlink Output Shelf 80-301408 Major Sub Components
Section Component
Part
Component Part Description Qty Per
Assembly
4.5.5.1. 02-010701 Bandpass Filter 2
4.5.5.2. 02-010901 Bandpass Filter 1
4.5.5.3. 07-004815 Crossband Splitter/Coupler 550/800MHz 1
4.5.5.4. 07-005754 Crossband Splitter/Coupler VHF/UHF 1
4.5.5.1. 07-018005 30dB Directional Coupler 1
These components are identical to those in Downlink Input Shelf 80-301407 in section 4.5.5 with the
exception of the 30dB Directional Coupler 07-018005 below
4.6.5.1. 30dB Directional Coupler (07-018005)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines and to combine them, for example though splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. 07-018005 is a Uni-Directional device and as such will only couple 30dB of
signal in one direction.
07-018005 Specification
PARAMETER SPECIFICATION
Frequency Range 70 MHz - 1000MHz
Mainline Insertion Loss <0.5
Coupling Loss 30 dB
VSWR Mainline Better than 1.3:1
Impedance 50 ȍ
Power Handling (CW) 100W
Outline (W x D x H) 176mm x 104mm x 24mm (ex. connectors)
Connectors N (female) on all ports
Case Material Aluminium
Finish Iridite NCP
operation
-20C to +60C
Temperature
range
storage
-40C to +70C
Weather Protection IP54