Questions tagged [usrp]
The usrp tag has no usage guidance.
39
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GNU Radio USRP B210 overflow when writing to fast SSD disk [closed]
I'm experiencing same issue described in that GitHub topic:
https://github.com/EttusResearch/uhd/issues/58
Here is my PC specs:
Win 10
AMD Ryzen 5 3600 6 Cores@4150MHz
16GB Ram@3600Mhz
ADATA SX8200PRO ...
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0
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0
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208
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How to trigger transmission using GNU Radio companion on a X310 USRP?
I am trying to transmit an RF signal that is created via GNU Radio Companion (GRC) on an X310 USRP, but I only want the signal to be present on the output when an external trigger is high.
There is a ...
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1
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2
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62
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Phase detection accuracy with USRP N210 and CBX-40
I have designed a simple TX/RX system in GRC with a single USRP N210 and CBX-40.
I am transmitting sinusoidal signals at various frequencies within the 2-6GHz range and detecting the amplitude and ...
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1
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Is there a way to make `gnss-sdr` work with USRP B210 showing the PVT solution?
gnss-sdr seems to be working, but never show coordinates or synchronization with any satellite.
I know that GPSDO included with my USRP only works with GPS ANT ...
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1
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275
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How to use RF Input B ports in GNU radio?
I have an Ettus B210, which has 4 ports: RF Input A: RX/TX and RX2, and RF Input B: RX2 and RX/TX. In GNU Radio using the USRP block I can use both ports of RF Input A. But I don't succeed to use the ...
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1
answer
506
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Is Gnuradio `file sink` data time domain data or frequency domain data?
When I enable file sink,I could save and read data of Gnuradio as below:
Questions as below:
1.Is the file sink data time ...
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1
answer
169
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How to set external clock of `--device-settings` in soapy_power?
External pps equipment connected with USRP.
In soapy_power,I set --device-settings 'clock_source=external' but failed.
...
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2
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0
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152
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Why the Receiver Sensitivity theoretical value doesn't match its experimental value when using USRP B200mini in GNU Radio?
I'm using a USRP B200mini SDR card for my GNU Radio energy detector project. I wanted to measure its Receiver Sensitivity ($RS$) experimentally and compare the experimental value to the theoretical ...
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1
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3
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344
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What can be used to protect an SDR receiver against bursts?
I am using a USRP B205 to detect electromagnetic pulses. Sometimes the signal power bursts to 100 dB, average power is around 10 dB. What can be used to protect the SDR receiver against bursts?
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613
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How to shift frequency with sine signal?
cosine signal can make square signal shift frequency.
If I have only sine signal source,how ...
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2
votes
1
answer
334
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USRP-B210 GPSDO will not lock
Hi I own a B210 and I have a GPSDO that's installed but I do not have the antenna yet. Can I use it as a 10MHz reference and PPS until I obtain the antenna?
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5
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2
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487
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What cause the spectrum peak of `center frequency`?
I use gnuradio and fosphor to view the spectrum from USRP B210, default gain set to 34, output looks like concave as below:
...
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2
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3
answers
150
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What cause the shape of frequency spectrum convex or concave?
I use gnuradio and fosphor to view the spectrum from USRP B210, default gain set to 34, output looks like concave as below:
...
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1
answer
355
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How to record and replay the `center frequency` when `file_sink`?
Workflow as below:
When file_source after file_sink,center frequency is not recorded and ...
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1
vote
1
answer
204
views
Does GPS port of USRP B210 only used for GPSDO?
I try to use gnss-sdr these days with USRP B210.
When I connect GPS antenna with RX port,gnss-sdr output well.But GPS antenna ...
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1
answer
72
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Does signal frequency affect the band width of SDR hardware?
I am new to SDR,already owned USRP B210 and start to learn Gnuradio.
I have follow question:
B210 has max bind width 56Mhz.When I use max sample rate to received signal,does the signal frequency(...
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1
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answers
45
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Labview Spectral Monitoring (USRP) - Bandwidth expansion and frequency change
I connected USRP (together with antenna) to my computer to receive some signals. For this purpose, I used the built-in module "Spectral Monitoring (Interactive)". Unfortunately I noticed ...
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2
answers
274
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Output power from the TX/RX port of the USRP N210 decreases as the frequency increases
I am trying to build an FMCW radar using a USRP N210 with a CBX40 daughterboard. I generate a sweep from 1.5GHz to 5GHz. According to their respective datasheets, the daughterboard and the USRP should ...
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1
answer
364
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Upconvert Signal with USRP N210 in GNU Radio Companion
I'm using a USRP N210 with this GRC diagram where I'm trying to upconvert a 1kHz sinewave.
I tried just upconverting the signal from the signal source to 2.5GHz. However, I keep getting the output ...
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0
votes
1
answer
846
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FMCW radar with USRP and GNU Radio Companion
I am new at gnuradio companion and USRP and I am a little bit confused with UHD:USRP Sink block. I am trying to build an FMCW radar in USRP N210 with CBX40 daughterboard. I want to generate a sweep ...
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3
votes
1
answer
598
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GNU Radio - Frequency parameter of Signal Source Block
I designed an analog FM transmitter with GNU Radio Companion in order to understand the tool better. The hardware I use is an USRP B200. The carrier was built with a Signal Source block and the ...
1
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1
answer
329
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Receiving different gain values on two RX channels on Ettus USRP B210
I am transmitting a continuous wave and using one USRP B210 with the kitchen_sink tool in order to save the received samples from two RX channels (v.3.15.0)
When I look into the received signal on ...
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1
answer
253
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Most accurate way to measure signal power with (cheap) Spectrum Analyzer
I am using an USRP X310 which is unfortunately not calibrated and the specs given are only very vague.
Hence I would want characterize the device with first-order measurements. Unfortunately I only ...
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99
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uhd_packet_rx do not work
I was trying to set up packet communication using examples in gr-digital/examples/uhd_packet_tx and rx. uhd_packet_tx is doing fine, but on receiver side(uhd_packet_rx) is freeze when i check up the ...
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0
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778
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Capturing Bluetooth / WiFi on an SDR
I have a question, right before purchasing SDR for some tests:
Commercial hardware for bluetooth (even Ubertooth) allows you to receive packets on a 1MHz channel. Which practicaly means that if you, ...
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267
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No module named 'analog_swig' [duplicate]
I know guys you gonna tell me tat there is something wrong about GnuRadio or Pybombs installation. Well, this is my third time during the past 48 hours I reformat the OS of my mini pc fitlet2 mint ...
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168
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No module named _osmosdr_swig [duplicate]
I am trying to run GnuRadio python code in my python web server and got the "No module named _osmosdr_swig" error. Please, what is the cause for this error?
I know it sounds like so obvious that I ...
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1
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0
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554
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Simple Gnuradio TX/RX loopback example/tutorial
I'm looking for some sort of simple and a beginner level instructions on how to build TX/RX loopback flowgraph using GnuRadio software and B200 USRP with an attenuator FW -10 + 10dB.
Kindly, help me ...
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6
votes
2
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238
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GnuRadio RF transmission, legal and safety issues
I'm trying to run some transmit/receive RF examples that I found online using GNU Radio with USRP B200. I read and heard about some cautions in terms of transmitted frequencies here in the USA which ...
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3
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2
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USRP Safe Gain Values
I am working with USRP N210 and USRP B200 radios with GNURadio. I have connected the TX/RX port of one radio to the RX2 port of the other with an RF cable as a simulated radio link. In GNURadio, I ...
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6
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2
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553
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Advantages of IQ generation at Mixer Stage or within FPGA for SDRs
I draw two possible architectures for Software Defined Radios below.
In the first architecture, I,Q signals are generated at the mixer stage and two ADCs are required. The FPGA down-samples the ...
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3
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1
answer
303
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How high an SWR can the USRP 2901 (B210) handle?
I connected a USRP 2901 (B210) to an amplifier I designed. The USRP seems to shutdown every time I try to transmit. I guess I messed up with the input impedance matching on the amplifier. Is it the ...
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2
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1
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2k
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How can I make WBFM receiver without using WBFM Receive block?
I'm trying to make a WBFM receiver without using WBFM Receive block. So I've tried this way
But it won't work. The problem is
RuntimeError: flow graph has loops!
and I need to use loop feedback ...
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1
answer
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How exactly does Data Whitening improve performance?
Prior to transmission, almost all wireless systems perform encoding on data to improve the packet reception rate. These may include, Forward Error Correction, Interleaving, Whitening, Gray Coding etc.
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2
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Ettus B210 USRP Is it possible to transmit on both Tx Ports either with same or different application?
Just getting up to speed on the ettus B210 - basically the same as the B200 but with two Rf boards.
I am testing using gnuradio-companion. I have setup a very simple transmitter consisting of:
...
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2
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627
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Hopping from one frequency band to another in SDR (ex: USRP)
This question is not about Frequency Hopping Spread Spectrum!
In SDRs, say USRP, if we are transmitting in a particular frequency band, can we dynamically hop from that band and transmit from ...
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3
answers
457
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Viewing the broadcast FM spectrum using a USRP N210
My issue is regards to viewing the FM spectrum using USRP N210 & GNU Radio. I did try to use several blocks of GNU Radio to view an FFT plot of the FM band using the USRP N210 device. My blocks ...
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2
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1
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217
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Choose the right dongle for NOAA images visualization with GnuRadio [closed]
I'm a newbie in such domain and I was reading some articles around the internet and what attracted me most is using the GnuRadio to see NOAA images using some cheap hardware.
I looked further it ...
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1
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1k
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USRP: Are RX and TX on the same or different channel for single daughterboard?
I've got a USRP X310, currently with just one daughterboard, a WBX-120. I'm writing some C which needs to operate the radio full duplex - I receive on RF A RX2 and transmit on RF A TX/RX.
But I'm ...
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