On 2021-10-11 8:24 a.m., Thangaraj Mukara Dhakshinamoorthy wrote:
Hello Everyone,
*_My system config:_*
Host OS: Windows 10
Guest OS: VirtualBox Ubuntu 20.04.3 LTS
UHD version: 3.15.0.0
GNU Radio version: 3.8.1.0
SDR Device : Ettus USRP N320
My Goal: Use Ettus N320 as Analysis tool (Ex: Spectrum Analyzer)
Console logs:
komro@komro-HP-ProBook-6560b:/usr/lib/uhd/examples$
./rx_samples_to_file --freq 98e6 --rate 5e6 --gain 20 --duration 10
usrp_samples.dat
Creating the usrp device with: ...
[INFO] [UHD] linux; GNU C++ version 9.2.1 20200304; Boost_107100;
UHD_3.15.0.0-2build5
[INFO] [MPMD] Initializing 1 device(s) in parallel with args:
mgmt_addr=192.168.10.2,type=n3xx,product=n320,serial=31F43B7,claimed=False,addr=192.168.10.2
[INFO] [MPM.PeriphManager] init() called with device args
`mgmt_addr=192.168.10.2,time_source=internal,clock_source=internal,product=n320'.
[INFO] [MPM.Rhodium-0] init() called with args
`mgmt_addr=192.168.10.2,time_source=internal,clock_source=internal,product=n320'
[INFO] [MPM.Rhodium-1] init() called with args
`mgmt_addr=192.168.10.2,time_source=internal,clock_source=internal,product=n320'
.
.
.
.
[WARNING] [MULTI_USRP] The hardware does not support the requested RX
sample rate:
Target sample rate: 5.000000 MSps
Actual sample rate: 5.015510 MSps
Actual RX Rate: 5.015510 Msps...
Setting RX Freq: 98.000000 MHz...
Setting RX LO Offset: 0.000000 MHz...
Actual RX Freq: 98.000000 MHz...
Setting RX Gain: 20.000000 dB...
Actual RX Gain: 20.000000 dB...
Waiting for "lo_locked": ++++++++++ locked.
Press Ctrl + C to stop streaming...
DGot an overflow indication. Please consider the following:
Your write medium must sustain a rate of 20.062041MB/s.
Dropped samples will not be written to the file.
Please modify this example for your purposes.
This message will not appear again.
DDDD
Done!
[ERROR] [UHD] Exception caught in safe-call.
in ctrl_iface_impl<_endianness>::~ctrl_iface_impl() [with
uhd::endianness_t _endianness = uhd::ENDIANNESS_BIG]
at /build/uhd-FRfZNJ/uhd-3.15.0.0/host/lib/rfnoc/ctrl_iface.cpp:50
this->send_cmd_pkt(0, 0, true); -> EnvironmentError: IOError: Block
ctrl (CE_00_Port_33) no response packet - AssertionError: bool(buff)
in uint64_t ctrl_iface_impl<_endianness>::wait_for_ack(bool, double)
[with uhd::endianness_t _endianness = uhd::ENDIANNESS_BIG; uint64_t =
long unsigned int]
at /build/uhd-FRfZNJ/uhd-3.15.0.0/host/lib/rfnoc/ctrl_iface.cpp:151
[ERROR] [UHD] Exception caught in safe-call.
in ctrl_iface_impl<_endianness>::~ctrl_iface_impl() [with
uhd::endianness_t _endianness = uhd::ENDIANNESS_BIG]
at /build/uhd-FRfZNJ/uhd-3.15.0.0/host/lib/rfnoc/ctrl_iface.cpp:50
this->send_cmd_pkt(0, 0, true); -> EnvironmentError: IOError: Block
ctrl (CE_00_Port_30) packet parse error - EnvironmentError: IOError:
Expected packet index: 28 Received index: 29
[ERROR] [UHD] Exception caught in safe-call.
in ctrl_iface_impl<_endianness>::~ctrl_iface_impl() [with
uhd::endianness_t _endianness = uhd::ENDIANNESS_BIG]
at /build/uhd-FRfZNJ/uhd-3.15.0.0/host/lib/rfnoc/ctrl_iface.cpp:50
this->send_cmd_pkt(0, 0, true); -> EnvironmentError: IOError: Block
ctrl (CE_01_Port_40) packet parse error - EnvironmentError: IOError:
Expected packet index: 566 Received index: 567
Performance within a VM is often very poor. If you replace the output
file with "/dev/null", ,does this change the behavior?
1. What should I do in order to fix this?
2. I tried the fm_receiver flowgraph in GNU Radio, it was running
successfully but when I tune the frequency there is nothing I could
hear except the first 5 seconds noise!
That would be a question for the discuss-gnuradio mailing list.
3. I also tried the example ‚Spectrum Analyzer‘ grc program, it was
also running without error but there was not much changes/effects when
I tune the frequency! Is there something wrong in receiver?
What gain setting did you use? What kind of antenna on the antenna port?
Thank you in advance!
Regards,
Thangz
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