Figure 6 -Wrapping Coax Connections - Elpro Technologies 915U-2 User Manual

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The net gain of the antenna/cable configuration is determined by adding the antenna
gain and the cable loss. For example, a 6 element Yagi with 70 feet (20 metres) of
Cellfoil cable has a net gain of 4dB (10dB – 6dB).
Maximum Gain per region
Australia / New Zealand
Typical Antenna Gains
Part No
DG900
CFD890EL
SG900-EL
SG900-6
YU6-900
YU16-900
Typical Coax losses (900 MHz)
Part No
CC3-SMA
CC10-SMA
CC20-SMA
Connections between the antenna and coaxial cable should be carefully taped to
prevent ingress of moisture. Moisture ingress in the coaxial cable is a common cause
for problems with radio systems, as it greatly increases the radio losses.
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Country
USA / Canada
Europe
Antenna
Whip with 15' (5m) cable
Dipole with 15' (5m) cable
5dBi Collinear (3dBd)
8dBi Collinear (6dBd)
6 element Yagi
16 element Yagi
Cable Type
10' (3m) Cellfoil Coax
33' (10m) Cellfoil Coax
66' (20m) Cellfoil Coax

Figure 6 -Wrapping Coax Connections

915U-2 Wireless I/O
Max Gain (dB)
6
0
0
Gain (dBi)
-2
0
5
8
10
15
Loss (dB per 30ft / 10m)
-1dB
-3dB
-6dB
User Manual