?????? Problems implementing USRP b210 dual channel transceiver

2022-12-07 Thread ????????
Hi,     Thank you for your reply, based on your suggestion I have tried the following:     ??No LO offset set (no uhd.tune_request)        Ch0:Center Freq : freq1        Ch1:Center Freq : freq2        ??freq1 = 2.4G, freq2=2.39G,samp_rate=300k??      ??Set LO Offset        Ch0:Center Freq : uhd.tu

Re: 回复: Problems implementing USRP b210 dual channel transceiver

2022-12-07 Thread Marcus Müller
Your LO offset still don't add up to the difference between freq1 and freq2. What frequency is the physical LO supposed to have? It cannot have frequency 2.4 GHz - 5 MHz and 2.39 + 2 MHz at the same time. These are different numbers! Best regards, Marcus On 07.12.22 09:09, 能书能言 wrote: Hi,  

Re: 回复: Problems implementing USRP b210 dual channel transceiver

2022-12-07 Thread Marcus Müller
Sorry, typo, hit ctrl-enter to send accidentally when trying to fix it. Let me say it correctly: Re: ① But you receive packets! So that's a good thing, I guess? Re: ② So, maybe the attached figure helps. The offset is the difference between the physical LO frequency f_{RF}, and the center freq

?????? ?????? Problems implementing USRP b210 dual channel transceiver

2022-12-07 Thread ????????
    The number of data packets in ?? is not correct, but the number of data packets in ?? is correct. Therefore, to avoid more problems, I choose ??.     By viewing the pictures in the attachment and your explanation, f_ RF is LO frequency? Then the two channels share one LO, so setting f_ Offs

Re: 回复: 回复: Problems implementing USRP b210 dual channel transceiver

2022-12-07 Thread Marcus D. Leech
On 07/12/2022 07:49, 能书能言 wrote:     The number of data packets in ① is not correct, but the number of data packets in ② is correct. Therefore, to avoid more problems, I choose ②.     By viewing the pictures in the attachment and your explanation, f_ RF is LO frequency? Then the two channels sh