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From: | Marcus D. Leech |
Subject: | Re: Galileo E5a and E5b bands simultaneously receiver with GRC |
Date: | Tue, 14 Feb 2023 16:47:33 -0500 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 |
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.htmlUsing a RF tuning policy of "manual" and a DSP tuning policy of "manual", and extract the appropriate pieces.
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