Архив за 24.11.2018

Доброго времени суток!Никому не попадался в продаже чип RTL2832?…

Доброго времени суток!
Никому не попадался в продаже чип RTL2832?

Signal Identification Help • Re: Sensus iPerl RF Signal

Encryption is possible, but I believe that it is a standard ASCII files by default. Should be something like meter ID and current gallons.

Statistics: Posted by eea123 — Sat Nov 24, 2018 9:57 pm


Заказал себе дешёвый RTL-SDR, https://ru.aliexpress.com/store/product/RTL-SDR-Blog-RTL-SDR-V3-R820T2-RTL2832U-1PPM-TCXO-…

ivanovgoga пишет:
Заказал себе дешёвый RTL-SDR, https://ru.aliexpress.com/store/product/RTL-SDR-Blog-RTL-SDR-V3-R820T2-RTL2832U-1PPM-TCXO-SMA-RTLSDR-Software-Defined-Radio-with/4523039_32936334224.html и прочитал что ...
читать полностью...
Широкополосный приёмник из DVB донгла - Страница #557

-- Delivered by Feed43 service

Заказал себе дешёвый RTL-SDR, https://ru.aliexpress.com/store/product/RTL-SDR-Blog-RTL-SDR-V3-R820T2-RTL2832U-1PPM-TCXO-…

Demeter пишет:
Заказал себе дешёвый RTL-SDR, https://ru.aliexpress.com/store/product/RTL-SDR-Blog-RTL-SDR-V3-R820T2-RTL2832U-1PPM-TCXO-SMA-RTLSDR-Software-Defined-Radio-with/4523039_32936334224.html и прочитал что ...
читать полностью...
Широкополосный приёмник из DVB донгла - Страница #557

-- Delivered by Feed43 service

Another 80m fest

submitted by /u/sirio2012
[link] [comments]

Is Meteor M2 not broadcasting?

Just dusted off my old setup and tried to catch a meteor m2 pass for the first time in quite a few months. During the entire pass I didn't get a single hint that there was a signal being transmitted on 137.9 or 137.1. Does anyone know if its something wrong with the satellite or possibly something wrong on my end?

submitted by /u/siyman4
[link] [comments]

Finding the optimal gain and squelch setting

I'm trying to find the optimal gain and squelch setting on a RPI using rtl_sdr. I started rtl_tcp together with gqrx and watched the signal with various gain values. The results are:

gain noise signal SNR

10 dB -62 dB -29 dB 33

20 dB -58 dB -20 dB 38

25 dB -55 dB -15 dB 40

30 dB -51 dB -10 dB 41

35 dB -47 dB -5 dB 42

40 dB -42 dB 0 dB 42

50 dB -34 dB 0 dB 34

https://i.imgur.com/KN0Nabx.jpg

So I thought that 35 dB is the optimal gain setting, because of the SNR. Now I started rtl_fm on the RPI with g=35 and squelch=0. My goal was to increase the squelch value by one until the noise is gone. However I noticed that I couldn't find the squelch value because soon that I reached a value where the noise is gone, parts of the signal are gone too.

I decreased the gain value and found out that at g=15 and squelch=5 I can hide the noise but hear the signal.

How could it be that the optimal value is so different in rtl_fm than with rtl_tcp and gqrx? And how can I find the best gain and squelch setting using rtl_fm than?

submitted by /u/repele
[link] [comments]

Comment on A Complete Linux based Receiver and Decoder Application for Meteor M2 by Corn

Cool, No problem. good luck 🙂

Comment on A Complete Linux based Receiver and Decoder Application for Meteor M2 by Neoklis

Unfortunately there is no clear indication on this problem. But since I am working on a very different version, please be patient and I will release it soon, once I crack the last remaining hard problems. If the problem persists then I can look into it.

Comment on A Complete Linux based Receiver and Decoder Application for Meteor M2 by Corn

blank screen:

(gdb) run
Starting program: /usr/local/bin/glrpt
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0x71fbd210 (LWP 744)]
[New Thread 0x717bd210 (LWP 745)]
[New Thread 0x70fbd210 (LWP 746)]
[New Thread 0x707bd210 (LWP 747)]
[New Thread 0x6ff01210 (LWP 755)]
[New Thread 0x6f5ff210 (LWP 756)]
[New Thread 0x6cd1b210 (LWP 757)]
[New Thread 0x6c3ff210 (LWP 758)]
*** Error in `/usr/local/bin/glrpt': corrupted size vs. prev_size: 0x005f9358 ***
[Thread 0x6cd1b210 (LWP 757) exited]

Thread 1 "glrpt" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb)

Перевод
Рубрики
Архивы
Ноябрь 2018
Пн Вт Ср Чт Пт Сб Вс
« Окт   Дек »
 1234
567891011
12131415161718
19202122232425
2627282930