User Manual

STTRS DOCUMENTATION
Document Number 80-330501HBKM – Issue A - Draft Page 248 of 500
14.3. Attenuator Shelf (ITAC) 2 (55-165506) major components
14.3.1. 900MHz 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 50Ω 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 50Ω 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
Narrowband 815 – 960MHz Frequency
range
Broadband 800 – 1200MHz
Narrowband 145MHz
Bandwidth
Broadband 400MHz
Input ports 1
Output ports 2
Narrowband 3.3dB
Insertion loss
Broadband 3.5dB
Return loss input & output 1.3:1
Impedance 50Ω
Narrowband >20dB
Isolation
Broadband >18dB
MTFB >180,000 hours
Splitting 20Watts
Power rating
Combining 0.5Watt
Connectors SMA female
Weight 200g (approximately)
Size 54 x 44 x 21mm
14.3.2. 4 Port Hybrid Coupler (05-003007)
This transmitter hybrid coupler is a device for accurately matching two or more RF signals to single or
multiple ports, whilst maintaining an accurate 50Ω load to all inputs/outputs and ensuring that the
insertion losses are kept to a minimum. Any unused ports should be terminated with an appropriate
50Ω load. In this specific instance one port of 4 Port Hybrid Coupler (05-003007) is terminated with
Dummy load 09-000902 (see below).
05-003007 Specification
PARAMETER SPECIFICATION
Frequency range: 700-900MHz
Bandwidth: 200MHz
Rejection: >14dB
Insertion loss: 6.5dB (in band, typical)
Connectors: SMA
Weight: <1.0kg
operational
:
-10%C to +60%C
Temperature
range:
storage -20%C to +70%C