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 63 of 148
3.6.5.2. Splitter/Combiner (05-002602)
The Splitter/Combiner used is a device for accurately matching two or more RF signals to single or
multiple ports, whilst maintaining an accurate 50: load to all inputs/outputs and ensuring that the
VSWR and insertion losses are kept to a minimum. Any unused ports should be terminated with an
appropriate 50: load.
Being passive devices, the splitters should have an extremely long operational life and require no
maintenance. Should a unit be suspect, it is usually most time efficient to replace the whole module
rather than attempt repair or re-tuning.
05-002602 Specification
PARAMETER SPECIFICATION
Frequency Range 800 – 1000MHz
Bandwidth 200MHz
Ports 3
Insertion loss 3.3dB typical
Return loss input & output 1.3:1
Impedance 50ȍ
Isolation >20dB
MTFB >180,000 hours
Splitting 20Watts
Power rating
Combining 0.5Watt
Connectors SMA female
Weight 200g (approximately)
Size 54 x 44 x 21mm
3.6.5.3. 30dB Directional Coupler (07-002907)
The purpose of these couplers is to tap off known portions (in this case 30dB) of RF signal from
transmission lines inband to combine them, for example through splitter units for different purposes
(alarms/monitoring etc.), whilst maintaining an accurate 50: load to all ports/interfaces throughout the
specified frequency range. They are known as directional couplers as they couple power from the RF
mainline in one direction only.
07-002907 Specification
PARAMETER SPECIFICATION
Frequency range 800 - 1000MHz
Insertion loss <0.3dB
Coupling level -30dB ±0.5dB
Rejection N/A
Weight <200g
Connectors SMA, female
operation -20°C to +60°C Temperature
range
storage -40°C to +70°C