On 11/05/2023 12:32, [email protected] wrote:
Hi everyone,
I would like to transmit and receive with a sample rate of 280KHz but
when I try it, I get the following messages :
[WARNING] [MULTI_USRP] The hardware does not support the requested TX
sample rate:
Target sample rate: 0.280000 MSps
Actual sample rate: 0.390625 MSps
[WARNING] [MULTI_USRP] The hardware does not support the requested RX
sample rate:
Target sample rate: 0.280000 MSps
Actual sample rate: 0.279330 MSps
So there is a problem specially in Tx side. I have understood that the
*master clock rate must be an integer multiple of the sampling rate*,
but the only clock rate values working with the X310 are 200MHz and
184.32MHz which are too high to be able to use a sampling rate of 280 KHz.
Is there any way to use a sampling rate of 2800 KHz ? I am forced to
use the UHD version 3.15 for other reasons but when I tried the UHD
version 4.1.0 I didn’t notice this issues.
Thank you very much in advance.
This may be of additional help:
https://kb.ettus.com/X300/X310#Clocking_and_Sampling_Rates
Also, the maximum decimation is 1024, not the 512 that I had previously
quoted. Different generations of the FPGA DUC/DDC code
have had different limitations on maximum decimation, and I had
simply mis-remembered.
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