Архив за Март, 2018

Touchstone RF Spectrum Analyzer попробывал у него водопад размытый до невозможности и скорость очень большая. rtlpan нор…

dimaxa213 пишет:
Touchstone RF Spectrum Analyzer попробывал у него водопад размытый до невозможности и скорость очень большая. rtlpan нормальный но почему то виснет...SpectrumSpy супер программа но не для простых (фл...
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Широкополосный приёмник из DVB донгла - Страница #544

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Signal Identification Help • Re: Huge Noise!

What SDR hardware are you using? If you are using an RTL-SDR, are you using AGC? Or perhaps you have the manual gain turned up too high?

Statistics: Posted by hotpaw2 — Sat Mar 31, 2018 8:58 pm


RTL-SDR Discussion • Re: question about how bandwidth is displayed

The visible bandwidth will depend on the particular SDR software visualizer you are using. Some show you the full sample rate bandwidth (or half sample rate for baseband ADCs), some show less. The useful bandwidth will depend on the phase accuracy and filter transition of the SDR hardware. Which may be why some software shows less.

There also may be spectrum analyzer software which shows a composite spectrum wider than the current sample rate.

Statistics: Posted by hotpaw2 — Sat Mar 31, 2018 8:56 pm


Comment on The BIG List of RTL-SDR Supported Software by Paul Lutus

Please include my new SDR program in your list: https://arachnoid.com/PLSDR/

Written in Python, works with most available devices, comprehensive feature set, relies on GnuRadio for its back-end.

Thanks!

RTL-SDR Discussion • question about how bandwidth is displayed

i want to know if the max zoom out is the max bandwidth the sdr can see at one time... because i want to see a large range of frequencies and see if there is a way to auto tune to a signal that is above a specific signal strength threshold...

Statistics: Posted by martronic — Sat Mar 31, 2018 6:27 pm


Comment on New Product: RTL-SDR Blog 1090 MHz ADS-B LNA by Ken R

Totally agree!

RTL-SDR Discussion • Signal caught. NoAA Reception

Hi.
I am trying to decode meteorological satellites.
Raspberry pi 3B, and rtl-sdr, everything seems to work fine but it gives me the following error "signal caught"
Any ideas?

system report
X-UID: 3

Found 1 device(s):
0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Tuner gain set to 44.50 dB.
Tuner error set to 55 ppm.
Tuned to 138392500 Hz.
Oversampling input by: 32x.
Oversampling output by: 1x.
Buffer size: 4.27ms
Sampling at 1920000 S/s.
Output at 60000 Hz.
Signal caught, exiting!
Signal caught, exiting!


User cancel, exiting...
sox WARN wav: Premature EOF on .wav input file
wxmap: warning: could not find matching pass to build overlay map.

Statistics: Posted by ea7tb — Sat Mar 31, 2018 2:30 pm


User Projects • Re: NOAA auto. decoder problem

Hi.
I had the same problem. After many tests, I realized that the error was the path in the file schedule_satellite.sh.
Review the path in PREDICTION_START and PREDICTION_END.
Greetings.

Statistics: Posted by ea7tb — Sat Mar 31, 2018 1:56 pm


Comment on New Apple iOS (iPhone/iPad) RTL-SDR rtl_tcp Client App in Beta Testing by Simon Johnson

I am curious as to whether this would work on a Raspberry Pi running Dump1090 in place on rtl-tcp. If so, it woyul dopen up the possibility that someone might be able to code an iOS app that would display aircraft that were broadcasting full ADS-B information and within range of the SDR dongle.

Even if it doesn’t, I am intrigued by the prospect of being able to at least monitor a RTL-SDR service running on a Pi Zero W on the local network using an iOS device and app!

Troubleshooting Help • Re: Failed to open rtlsdr device #0.

Had the same problem on a Raspberry Pi system.

Problem was the system service was still running and using the rtlsdr. Maybe your test isn't working because some other software has already got use of the rtlsdr

Statistics: Posted by amck — Sat Mar 31, 2018 12:14 pm


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