Discussion related to the rtl-sdr project, which enables certain television dongles and other hardware to be used as a cheap SDR receiver
Questions tagged [rtl-sdr]
113 questions
6
votes
1 answer
SDR - FM Radio station interference
I want to learn about software defined radio and how wireless transmission work in general.
So I started messing around with SDRSharp and a little antenna I bought.
I figured I would start looking at known frequencies like local radio stations.…
DotNetRussell
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- 4
6
votes
1 answer
Cell Tower distance measurement
I am developing a hobby project to detect/measure the distance between my cell phone and a cell tower (GSM tower).
I am newbie. I don't even know whether this is possible or not.
I have following hardware:
Raspberry Pi 3
RTL2832u
I am planning to…
Avadhana Technologies
- 163
- 5
5
votes
1 answer
Images up and down the spectrum
I brought an rtl-sdr USB stick to a foreign country. I am listening with gqrx, and I am surprised to find audio (e.g. television or radio) up and down the spectrum, up to 600, 700 and 800 MHz ranges. I haven't experienced this in the States. I…
Ken - Enough about Monica
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4
votes
2 answers
rtlsdr - hearing an FM broadcast on different frequencies
There is an FM station in my city which transmits at 105 MHz.
Today I discovered that I can also hear it quite well if I set the LO to 32.6 MHz and then shift the signal a bit. I'm using an rtlsdr with RT820T2 and gqrx.
Some of the combinations…
Ardavast Dayleryan
- 153
- 8
2
votes
1 answer
quadrature demodulator on a chip
I am searching for a single chip/small board solution for quadrature demodulation to sample IQ signals with an integrated ADC for DC-50Mhz frequencies.
The reason for that is that I found this sdr transceiver and I was wondering if sampling could be…
Ulterior
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2
votes
1 answer
Power surge on hub when using NooElec nesdr mini
I'm trying to set up sdrSharp on my PC using a NooElec nesdr mini for the receiver. I've read a bunch of setup instructions which all suggest using Zadig to install the usb drivers for the receiver.
However, whenever I plug the nesdr into my usb…
Ben Glasser
- 123
- 3
2
votes
3 answers
Problem with RTL-SDR v3 dongle - unusable PLL
I own an RTL-SDR v3 USB dongle (official version from rtl-sdr.com). I've successfully used it for decoding weather satellites past year. I use (GQRX + Audacity)/(Arch Linux 64bit) + (WXtoIMG)/(Windows 10 64bit) combination to receive and decode NOAA…
Drobot Viktor
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2
votes
1 answer
how to select an SDR stick remotely from gqrx via soapysdr
I have a raspberry pi 3b on my roof (in a plastic box) with two SDR sticks attached to it.
On the raspberry pi the "soapysdr" program runs.
root@antenne:/# lsusb
Bus 001 Device 005: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001…
Folkert van Heusden
- 203
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- 7
1
vote
2 answers
Batch sampling SDR
I am using RTLSDR on macOS with Cubic SDR, it works great and is very intuitive.
Now I want to do a frequency envelope analysis where I need to basically 3-d plot intensity versus frequency and time. I can probably figure out the math to do that…
William Entriken
- 111
- 3
1
vote
1 answer
Unitrunker Receivers Not Displaying Fields
I've been playing around with RTL-SDR and Unitrunker attempting to get a police scanner working. I followed the tutorial here: https://sites.google.com/site/policescannerhowto/
Everything works as expected until I run Unitrunker and try to add the…
shenk
- 113
- 4
1
vote
1 answer
RTL-SDR - rtl_fm: undefined symbol: rtlsdr_set_bias_tee
On a Raspberry Pi 3 B+ running Raspbian Stretch, when I run this command,
timeout 115 rtl_fm -d 0 -g 49 -M usb -s 32000 -r 32000 -F 1 -f 50.293M outfile.raw
I get the following messages, the last line of which is an error:
Found 1 device(s):
0: …
Chris K8NVH
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