Thank you, Chris.
I have updated the FPGA image from the USRP X440 to the X4_200, and upon
executing, the sampling rate has been reduced to approximately 5 Msps.
Another matter I would like to inquire about is whether it is possible to
reduce the analog bandwidth of the signal from 200 MHz to 100 MHz. I am aiming
to use the X440 with OpenAirInterface5G in FR1, but since the image is from the
X4_200, which is tied to a 200 MHz bandwidth, I would like to know if there is
any workaround to perform this downgrade."
However, in some tests that were performed, the receive timeout error appears,
even using the 5e6 sampling rate, increasing the value to 99 \*Num timeouts
(Rx): 99\*. And I don't know why these receive errors appeared.
root@ni-x4xx-342597F:/usr/lib/uhd/examples# ./benchmark_rate --rx_rate 5e6
--tx_rate 5e6
\[INFO\] \[UHD\] linux; GNU C++ version 11.4.0; Boost_107800;
UHD_4.7.0.0-0-ga5ed1872
\[00:00:00.029460\] Creating the usrp device with: ...
\[INFO\] \[MPMD\] Initializing 1 device(s) in parallel with args:
mgmt_addr=127.0.0.1,type=x4xx,product=x440,serial=342597F,name=ni-x4xx-342597F,fpga=X4_200,claimed=False
\[WARNING\] \[MPM.RPCServer\] A timeout event occured!
\[INFO\] \[MPM.PeriphManager\] init() called with device args
\`fpga=X4_200,mgmt_addr=127.0.0.1,name=ni-x4xx-342597F,product=x440,clock_source=internal,time_source=internal,initializing=True'.
Using Device: Single USRP:
Device: X400-Series Device
Mboard 0: x440
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: 0
RX Channel: 1
RX DSP: 1
RX Dboard: A
RX Subdev: 1
RX Channel: 2
RX DSP: 2
RX Dboard: A
RX Subdev: 2
RX Channel: 3
RX DSP: 3
RX Dboard: A
RX Subdev: 3
RX Channel: 4
RX DSP: 4
RX Dboard: B
RX Subdev: 0
RX Channel: 5
RX DSP: 5
RX Dboard: B
RX Subdev: 1
RX Channel: 6
RX DSP: 6
RX Dboard: B
RX Subdev: 2
RX Channel: 7
RX DSP: 7
RX Dboard: B
RX Subdev: 3
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: 0
TX Channel: 1
TX DSP: 1
TX Dboard: A
TX Subdev: 1
TX Channel: 2
TX DSP: 2
TX Dboard: A
TX Subdev: 2
TX Channel: 3
TX DSP: 3
TX Dboard: A
TX Subdev: 3
TX Channel: 4
TX DSP: 4
TX Dboard: B
TX Subdev: 0
TX Channel: 5
TX DSP: 5
TX Dboard: B
TX Subdev: 1
TX Channel: 6
TX DSP: 6
TX Dboard: B
TX Subdev: 2
TX Channel: 7
TX DSP: 7
TX Dboard: B
TX Subdev: 3
\[00:00:04.112276974\] Setting device timestamp to 0...
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#0\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DDC#1\] The requested decimation is odd; the user should expect
passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will
enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 49
\[WARNING\] \[MULTI_USRP\] Could not set RX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[00:00:04.465504150\] Testing receive rate 5.015510 Msps on 1 channels
\[WARNING\] \[0/DUC#0\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#0\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#0\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#0\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#1\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#1\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#1\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
\[WARNING\] \[0/DUC#1\] The requested interpolation is odd; the user should
expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.
\[WARNING\] \[MULTI_USRP\] Could not set TX rate to 5.000 MHz. Actual rate is
5.016 MHz
Setting TX spp to 352
\[00:00:04.801908845\] Testing transmit rate 5.015510 Msps on 1 channels
\[00:00:14.826000429\] Benchmark complete.
Benchmark rate summary:
Num received samples: 50161056
Num dropped samples: 0
Num overruns detected: 0
Num transmitted samples: 50201888
Num sequence errors (Tx): 0
Num sequence errors (Rx): 0
Num underruns detected: 0
Num late commands: 0
Num timeouts (Tx): 0
Num timeouts (Rx): 0
Done!
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