FAQ - External antennas - output power / cable loss
Valid for: |
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| N870E |
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Introduction
The Effective radiated power from an Gigaset N870E with the Gigaset delivered Antennas (3dB) is compliant with the German / European regulations for the DECT radiated power. Check your own country regulations.
When using an external antenna, the formula Antenna gain - cable loss <= 3dB is still valid.
We need to reduce the power with 5dB to match the European regulations.
Cable dB gain loss
The cable loss depends on:
- Cable type
- Cable Length
- Cable diameter
Examples:
Type | Diameter | Loss |
|---|---|---|
RG223 | 5.4 mm | Loss/100m: 60 dB |
RG174/U | 2.8 mm | Loss/100m: 142dB |
Aircell 5 | 5 mm | Loss/100m: 45 dB |
Aircell 7 | 7 mm | Loss/100m: 21 dB |
Ecoflex 15 | 15 mm | Loss/100m: 16 dB |
Example:
Using 5 meter RG223 cable = 3 dB loss
Antenna gain - cable loss <= 3dB
8 dB - 3 dB = 5 dB is still 2 dB to high.
The signal strength can be further reduced by external hardware or by the system: FAQ - Base stations Edit