Re: Galileo E5a and E5b bands simultaneously receiver with GRC

On 14/02/2023 15:16, Sylvain Munaut wrote:
> Hi,
>
>
>> - Number of channels: 1 ( Since USRP 2190 model has only 1 local oscillator, it will not be possible to use 2 simultaneously channels for receiving)
> Well, you could still tune the RF between the two freq and then use
> the DDC to shift and decimate each channel separately so that you can
> have a sample rate much much lower than bringing the full 50 MHz to
> the PC.
> It saves on USB traffic, making it more reliable and on host side processing.
>
> Just my 2 ct.
>
> Cheers,
>
> Sylvain
>
You presumably mean the USRP 2901 ?

In which case, yes, there's only 1 LO shared between the two RX inputs.


You'll need to explore here:

https://files.ettus.com/manual/structuhd_1_1tune__request__t.html

Using a RF tuning policy of "manual" and a DSP tuning policy of
"manual", and extract the appropriate pieces.