Re: [Discuss-gnuradio] Transmit Power of USRP B210

[Prabhat Kumar Rai]

Dear Marcus & Vitt,

Thanks for your suggestion.
As I am new in this field I don't know how to calibrate spectrum
analyser with usrp. Is there any video tutorial or any website link
you can provide will be helpful? I have searched on internet but
didn't get a thing for calibration.

Suggestion from other members is also welcome.

Regards
Prabhat

On Tue, Apr 24, 2018 at 3:03 PM, Müller, Marcus (CEL) <address@hidden> wrote:
> You'll have to calibrate that yourself. There's no fixed formula for
> all possible individual devices, and all possible signals (with all
> possible PAPRs, which is especially relevant for OFDM).
>
> Best regards,
> Marcus
>
> On Tue, 2018-04-24 at 13:05 +0530, Prabhat Kumar Rai wrote:
>> Hello,
>>
>> I am using tx_ofdm.grc file to transmit a signal via USRP B210. I am
>> fixing my system as center_freq 1.8GHz, BW 20MHz, Sample rate 1.92M,
>> Gain 20 dB, when I am checking the gain in the spectrum analyser it
>> comes out to be -77dBm, I know that channel is giving me around 30 dBm
>> attenuation still I am unable to compute the actual transmit power of
>> usrp.
>> I know that only way to know transmit power is using the combination
>> of frequencies, sampling rates, master clock rates, analog bandwidths
>> and gain but don't know how and where to use them, all of them are
>> already in a usrp_sink block.
>>
>> Is there any other way to compute actual transmit power of Usrp or any
>> other formulae???
>>
>>
>> I have to use that power for RSSI calculation.
>>
>>
>> Regards,
>> Prabhat
>>
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