RTL-SDR: Difference between revisions

From regional-training
VisualWikitext
 
(30 intermediate revisions by the same user not shown)
Line 1: Line 1:
<font color=red>This page is a preliminary release.</font>
=SDR=
=SDR=
* https://hackaday.com/2021/03/08/what-can-a-30-usb-spectrum-analyser-do-for-me/
* https://hackaday.com/2021/03/08/what-can-a-30-usb-spectrum-analyser-do-for-me/
Line 5: Line 7:
==RTL-SDR==
==RTL-SDR==


Be Very Very careful to purchase the Rtl-Sdr from reputable suppliers - there are many fake and hacked units.
Be Very Very careful to purchase the Rtl-Sdr from reputable suppliers - there are many fake and hacked units. The real ones are alleged to have a nut on the SMA connector and are all in aluminium cases (grey and black).  There are also multiple versions with the bias-T; these require different software configuration. The V2 bias T has been well proven - do research on the V4 <ref>RTL-SDR V4 https://www.rtl-sdr.com/v4/</ref> <ref>RTLSDR V4 datasheet https://www.rtl-sdr.com/wp-content/uploads/2024/12/RTLSDR_V4_Datasheet_V_1_0.pdf</ref> bias T SDR before purchasing.


[[image:rtl-sdr-sma.png]]
[[image:rtl-sdr-sma.png]]
Line 122: Line 124:
==tracking==
==tracking==
* device range https://ktrax.kisstech.ch
* device range https://ktrax.kisstech.ch
** VH-SXQ https://ktrax.kisstech.ch/plot?device=DDB6BE  (-78 kHz off frequency, range 22.5 km)
** VH-SVQ https://ktrax.kisstech.ch/plot?device=D00562
** VH-DJU https://ktrax.kisstech.ch/plot?device=DD4F8D
** '''VH-JUS''' https://ktrax.kisstech.ch/plot?device=DF217C  (-9.45 kHz, range 40 km+)
** VH-SMS https://ktrax.kisstech.ch/plot?device=DDB6C6  (+73.9 kHz, range 21 km)
** VH-NKC https://ktrax.kisstech.ch/plot?device=DDB6BC  (+78.8 kHz, range 24 km)
** VH-DGU https://ktrax.kisstech.ch/plot?device=DD4F8D
** VH-HDP https://ktrax.kisstech.ch/plot?device=DDB6B4  (+76.7 kHz range 38 km - very spotty might have been high)
** VH-GOB https://ktrax.kisstech.ch/plot?device=DDDE3E
** VH-DGI https://ktrax.kisstech.ch/plot?device=DDB459
** VH-ZAK https://ktrax.kisstech.ch/plot?device=7C7E9A
** VH-DGU https://ktrax.kisstech.ch/plot?device=DD4F8D
** VH-XQT https://ktrax.kisstech.ch/plot?device=DDB6FE
** VH-FQD https://ktrax.kisstech.ch/plot?device=DDB346
** '''VH-YZJ''' https://ktrax.kisstech.ch/plot?device=7C7D0D (-13.4 kHz range 40 km + )
** VH-UHM https://ktrax.kisstech.ch/plot?device=DF0B6A
* navplan https://www.navplan.ch/#/traffic
* navplan https://www.navplan.ch/#/traffic
* https://live.glidernet.org/#c=-34.67092,148.02074&z=12&s=1
* https://live.glidernet.org/#c=-34.67092,148.02074&z=12&s=1
Line 143: Line 129:
* https://tracking.livegliding.com/#!c=66,67&mz=8&mc=146.90834,-34.36949&time=1735698597&r=true&d=20250101
* https://tracking.livegliding.com/#!c=66,67&mz=8&mc=146.90834,-34.36949&time=1735698597&r=true&d=20250101
* https://flightbook.glidernet.org/logbook/YCTM/ can use this to lookup S-codes.
* https://flightbook.glidernet.org/logbook/YCTM/ can use this to lookup S-codes.
==antenna design==
==antenna design==
Extract this data into a table.
Extract this data into a table.
Line 148: Line 135:
Coax suppliers:
Coax suppliers:
* https://rfshop.com.au/product-category/coaxial-cable/?utm_source=google&utm_medium=cpc&utm_campaign=18319066715&utm_content=141192502557&utm_term=coaxial%20cable&gad_source=1&gclid=EAIaIQobChMIg-aql63nigMVMYRLBR2bBAiCEAAYASAAEgJn6_D_BwE
* https://rfshop.com.au/product-category/coaxial-cable/?utm_source=google&utm_medium=cpc&utm_campaign=18319066715&utm_content=141192502557&utm_term=coaxial%20cable&gad_source=1&gclid=EAIaIQobChMIg-aql63nigMVMYRLBR2bBAiCEAAYASAAEgJn6_D_BwE
==power tap==
[[Rf power tap and metering]]
 
{{::coax}}


* [[image:power-tap.png]]
==urls==
** https://www.youtube.com/watch?v=fKPG1FWcB5c
* https://timesmicrowave.com/wp-content/uploads/2022/03/lmr-600-coax-cables-datasheet.pdf https://www.pasternack.com/images/ProductPDF/PE-C400.pdf?srsltid=AfmBOorEL7i6t6pUIPrE3PhJbqCCZd4U-VC7BBIT_5He-kzCD5JTrbyf https://www.professionalwireless.com/wp-content/uploads/2020/07/Ecoflex10-Spec-Sheet.pdf
* [[image:power-coupler.png]]
* https://timesmicrowave.com/wp-content/uploads/2022/06/lmr-400-datasheet-1.pdf https://www.prioritywire.com/specs/RG11-u%20Coaxial%20Cable.pdf
** https://www.youtube.com/watch?v=v_eBQ4Qp1_E
* http://www.whwestlake.co.uk/westlake-pdf/WF103.pdf https://www.pasternack.com/images/productpdf/rg218-u.pdf?srsltid=AfmBOooFsgnKsmpFmW_aLofu6O9ZWBp0A7BgX7EDdRqdBqGomfblUlUw
* https://timesmicrowave.com/wp-content/uploads/2022/06/lmr-300-uf-datasheet.pdf https://timesmicrowave.com/wp-content/uploads/2022/06/lmr-240-datasheet.pdf
* https://www.pasternack.com/images/productpdf/rg213-u.pdf?srsltid=AfmBOoo7MKepGJBbI4c2ihuoOcArBWxz0EJZ5cMS7G-yLcsdQnjKAjJ0 https://www.pasternack.com/images/productpdf/rg6a-u.pdf?srsltid=AfmBOopxQ6_hUo55PENPZyBM-mDMvMjFQ3qK6EBS-fZoHXlywJMurpdH https://www.pasternack.com/images/productpdf/rg142b-u.pdf?srsltid=AfmBOoqIF0wyYbQyp363dD180mZLxBNG7ulOa5sVKR6WACUWMjBXjyR6 https://www.pasternack.com/images/productpdf/rg400-u.pdf?srsltid=AfmBOooGewYcPtsqTRIfiJw-AIbbqtNQ0Ea_YBJ-FnQDZHDiSggLVxnr https://www.pasternack.com/images/productpdf/rg58c-u.pdf?srsltid=AfmBOopstxetBNa4wYoqbB4spqqnWzod2nRFZVVsQ-s85w0vAbXa-IDU
*https://www.pasternack.com/images/productpdf/rg316-u.pdf?srsltid=AfmBOoqLaOhrS8ZcIG4N8LTTfHR5yYV5c-yJNCAIqGX5FoPoEGl6xZOV


==SMA attentuators==
==SMA attentuators==
Line 185: Line 177:


=Receiver Software=
=Receiver Software=
* '''[[Piaware_ADS-B_receiver]]'''
* '''[[SDR_OGN_flarm]]'''
* https://github.com/gqrx-sdr/gqrx
* https://github.com/gqrx-sdr/gqrx
* tweak
* tweak
Line 212: Line 206:
[[category:SDR]]
[[category:SDR]]
[[category:Index]]
[[category:Index]]
[[category:FLARM]]
[[category:OGN]]
[[category:Public]]
[[category:pi]]
[[category:RF]]

Latest revision as of 16:34, 2 December 2025

This page is a preliminary release.

SDR


RTL-SDR

Be Very Very careful to purchase the Rtl-Sdr from reputable suppliers - there are many fake and hacked units. The real ones are alleged to have a nut on the SMA connector and are all in aluminium cases (grey and black). There are also multiple versions with the bias-T; these require different software configuration. The V2 bias T has been well proven - do research on the V4 [1] [2] bias T SDR before purchasing.

review

clones

Be careful, there are clones on the market that do not perform like the originals!

The RTL-SDR clones do not have a nut on the SMA connector! See https://www.rtl-sdr.com/rtl-sdr-blog-v-3-dongles-user-guide/

Radio TLS SDR USB Tuner Receiver RTLS2832U+R820T2 100 kHz-1.7Ghz

parts

AirSpy

LNA

filters

915 MHz Bandpass filter

This BPF is nearly perfect for GSM band and would help remove out of band channel interference of SDR receivers.

OGN technical data

Open Glider Network.

FLARM frequencies

Frequency Location
868.2-868.4 MHz Europe
Africa
869.2 MHz New Zealand
902-928 MHz North America
916.2 MHz Israel
917-926.6 MHz Australia
South America

Firmware

OGN software is installed on a raspberrypi with an overlay filesystem.

Antennas

These antennas provide a d.c. short to the input. This is undesireable for portable equipment where the LNA may need to be removed and the people are not aware or unable to turn the bias-tee off in the RTL dongle.

These do not provide a d.c. short to the input:

Measuring the velocity factor:

Measuring ferrites:

tracking

antenna design

Extract this data into a table. File:Antenna.xls Coax suppliers:

Rf power tap and metering

{{::coax}}

urls

SMA attentuators

engineer SCGC FLARM RX

  • scan for raspberry pi on SCGC WiFi router:
sudo nmap -sS 192.168.0/24
  • look at stats
http://192.168.0.192:8080
http://192.168.0.192:8081
  • login
ssh pi@192.168.0.192
runway06

overlay fs

Receiver Software

categories

  1. ↑ RTL-SDR V4 https://www.rtl-sdr.com/v4/
  2. ↑ RTLSDR V4 datasheet https://www.rtl-sdr.com/wp-content/uploads/2024/12/RTLSDR_V4_Datasheet_V_1_0.pdf
Retrieved from ‘https://regional-training.org:443/rt-dir/index.php?title=RTL-SDR&oldid=3259’