On 2022-05-07 10:03, 王璀 WANG Cui wrote:
Understood, clarified resample is the solution. Thanks,
BTW, when I read the txrx_loopback_to_file example, it does make 2
usrp objects (1 tx, 1 rx) point to 1 device, how can it work?
I should clarify my comment---it's "per direction".
*From:*Marcus D. Leech <[email protected]>
*Sent:* Saturday, May 7, 2022 9:50 PM
*To:* [email protected]
*Subject:* [USRP-users] Re: X300 simultaneously transmit 2 signals of
different sample rate and center frequency
On 2022-05-07 08:22, ?? WANG Cui wrote:
Hi,
I searched around and still can’t get clear answer, so I would
seek help here.
I want to simultaneously transmit 2 baseband files which are
different sample rate (one is rate 2.5 MHz at freq 1.5 GHz, and
the other is rate 8 MHz at freq 1.8 GHz), and would like to
utilize 2 daughter boards of X300.
I tried to configure it with 2 multi_usrp objects, but the call
failed when get second tx_streamer (however, the first get call
succeed.), with: Error: RuntimeError: Multiple sampling rates
downstream of TX terminator 0: ...
I know X300 can transmit/receive 2 channels at 2 different sample
rate, just wonder is it possible to simultaneously transmit 2
channels as described above? Or have to resample one file to the
same sample rate of the other file, then transmit together?
Thanks in advance,
WANG Cui
You can't have multiple multi_usrp objects pointing to the same
device, so you'll have to resample one of your streams and use a
single multi_usrp object.
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