TD next - Community

Hello
I have some link budget issue on UL
What is the TD1208 nominal Tx power value (10 dBm?).
How can I can i access and manage the PA to boost the power transmission?
Thanks
Francois

Hi,

On a TD1208 Tx current at 10dBm is 37mA. Default and recommended value is 14dBm which draws 50mA.

Use the TD_SIGFOX_RfPower function to configure it (param in dBm range 0 to 14).

Please note that for user having a TD1205 the range is 0-20 with 20dBm drawing 100mA.

Regards.

Thanks!
Is 10dBm the default value?
Francois

No default is 14dB.

I guess that those 14dBm limit for the max. tx power are with the purpose to maintain compliance with the regulatory requirements of the ETSI standard.
Does it mean that the TD1205 at 20dBm is not compliance with the standard?
Thank you in advance for your help.

TD1205 is losing 6dB in the antenna resulting in a 14dB transmission.

Thank you for your prompt response.
Still another question, when we are powering the TD module at 3V (instead of 3,3V) do we still get 14dBm as Tx power?
if not, is there a way to achieve those 14dBm with 3V as power supply?

No you're going to lose 0.5dBm per 300mV down to 2.1V. And unless using a regulator there is nothing you can do about it.

I'm not sure I understand what you mean by "unless using a regulator". I actually plan to use a regulator with a 3V fixed output to power the entire system. Would I still get those 14dBm that way?

I meant using a 3.3V regulator.