Question

The declared output power of the GSM is indicated at 33dBm, the antenna that is in boundle has a 3dBi gain, so the total EIRP will be 36 dBm. The ETSI indicate as a +33dBm maximum power, so there's a parameter to limit the output power or I need to add an attenuator of 3dB?

Answer 1

Hello,

Couple things RUT240 has CE/RED certificate: https://wiki.teltonika-networks.com/view/RUT240_CE/RED which covers he Radio Equipment Directive (RED)- 2014/53/EU the EMC Directive- 2014/30/EUand as far as I know this belongs to ETSI standard.

Also, RUT240 is using Quectel EC25 LTE module which supports maximum 33dBm for RF output power: https://www.quectel.com/UploadImage/Downlad/Quectel_EC25_Hardware_Design_V2.3.pdf page 102 - 103

So you should be good by simple using our standard antennas.

Comments

Thanks for your reply, but with the module +33dB plus the +3dBi of the antenna my EIRP is going over the limit of +33dB of maximum permitted for GSM, also on the https://teltonika-networks.com/downloads/en/rut240/QSG_RUT240_EN_v2.1.pdf say that the user is responsible for the compliance with the legal regulations, so if there isn't a parameter for regulating the output power of the EC25 I need to: use an antenna with 0dBi or add an attenuator.

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I've looked better at the link of the CE/RED certificate and effectively on the first page is written that the max output is 25.99dBm, but on the https://teltonika-networks.com/downloads/en/rut240/QSG_RUT240_EN_v2.1.pdf is written 33dBm and also you tell me 33dB.

Both are official document, which one I need to consider?

Thanks

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Hello,

RUT240 QSG  as well as EC25 module datasheet specifies the maximum continuous transmission power allowed by the ETSI standard (+33dBm).

Meanwhile RUT240 DoC indicates maximum average RF output power (+25.99dBm). GSM signal consists of bursts, so maximum average power is lower than maximum continuous transmission power. Therefore you can use antennas up to 7dBi without breaking standart limits.