MicroAir Avionics T2000SFL, Installation Manual

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Microair Avionics T2000SFL Transponder Installation Manual
5.0 COAXIAL CABLE
The T2000SFL allows for 1.5dB cable loss from the unit to the antenna. The installer should consider
carefully what type of coaxial cable is to be used, so that this loss limit is not exceeded. The cable should be
terminated with silver plated BNC connectors where possible.
Microair recommends the following:
Cable
Bending
Radius
Loss @ 1Ghz
dB/m
Max Length TX Power
RX
Sensitivity
RG58/C/U
(Mil Spec) 50mm
(2”)
0.76dB/m
0.21dB/ft
2.0m
7ft
142W -70dBm
RG213/A/U
(Mil Spec) 125mm
(5”)
0.26dB/m
0.08dB/ft
5.75m
19ft
142W -70dBm
RG223/U
(Mil Spec) 100mm
(4”)
0.47dB/m
0.14dB/ft
3.2m
10ft
142W -70dBm
RG400
(Mil Spec) 50mm
(2”)
0.60dB/m
0.18dB/ft
2.5m
8ft
142W -70dBm
Belden 8262 50mm
(2”)
0.68dB/m
0.21dB/ft
2.2m
7ft
142W -70dBm
URM-43 50mm
(2”)
0.47dB/m
0.14dB/ft
3.2m
10ft
142W -70dBm
IMPORTANT NOTE
Do not exceed the minimum bending radius. Tight bends will introduce
losses in the cable, which may affect the performance of the transponder.
When fixing the coax cable in the airframe, do not “strangle” the cable
with tight cable ties. This can distort or damage the coax screen.
T2000SFL Installation Manual 01R7-1 Page 8 of 23 25
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