TX POWER For Ble Radio Test Example

[ChiragBhavsar]

I used nRF52840 board with SDK 17_1_0 ,

For FCC Certificate We used Radio Test Example,

using  start_channel 40 & start_tx_carrier we change the frequency and we are able to see changeable freq on spectrum analyzer,

But When we send Output_power pos0dBm or  Output_power pos8dBm we are not able to see any power change in spectrum analyzer,

we got -32dbm power on spectrum analyzer when we send both 0dbm and 8dbm command,

so when we want to send Output_power pos0dBm after  start_channel 40 or before it,

or How we can change default power in Radio Test Example.

 

[Håkon Alseth]

Hi,

 

-32 dBm sounds way too low.

Q1: Can you share a picture of the spectrum in both working and non-working scenario?

Q2: Can you share the exact commands that you sent?

 

Kind regards,

Håkon

[ChiragBhavsar]

Hi,

Now we changed the Radio Test Firmware and we make default power 8dbm,

in 8dbm we got -17.13dbm power so This is good for the FCC Certificate? If not good then how we can resolve this problem?

[Håkon Alseth]

Hi,

 

You have a dampening of ~25 dB. Have you gotten your design reviewed by us? If not, could you please create a private ticket and ask for a review of your design?

 

Kind regards,

Håkon

[ChiragBhavsar]

Hi,

Sure i will create private ticket for it but right now can you please tell me this power can effect on FCC Certificate?

[Håkon Alseth]

25 dB loss is a lot, in terms of performance of your product (ie. range etc)

How many of your boards are showing this issue? Is it only one board, or many?

Can you share a picture of how you connected the board?

 

Kind regards,

Håkon