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
|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|
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 Nx70 - Base stations Edit