Архив за 11.09.2018

User Projects • Re: RPI3 as audio server

openwebrx, but does have control features....web based

Statistics: Posted by tim_rtd — Tue Sep 11, 2018 7:20 pm


NOAA 18 APT Starting to show Florence.

NOAA 18 APT Starting to show Florence.

Some images from NOAA 18 (9/11/18) today:

https://i.redd.it/xekiatccvml11.png

https://i.redd.it/9v78hkqivml11.png

submitted by /u/jeffreypkelly
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Signal Identification Help • Re: what is this signal on 167 mhz ?

I too have this same question. If anyone knows then please make it clear. Also, suggest some links from where I can acquire a brief knowledge about all these. Thanks in advance for your help. Regards, Jack Logan.

Statistics: Posted by callmejacklogan — Tue Sep 11, 2018 6:51 pm


Signal Identification Help • Re: 433mhz waveform. FSK? GFSK? GMSK?

It is none other than 2FSK. I don't have that much detailed knowledge but as much as I know this is 2FSK. Thanks and Regards, Jack Logan

Statistics: Posted by callmejacklogan — Tue Sep 11, 2018 6:50 pm


User Projects • RPI3 as audio server

Hi,

I want to use an RPI3 with RTL-SDR Stick as an audio server to monitor just one frequency.
On the Client side I just want to open a Browser window and listen to the stream.
Remote control, etc. is not wanted!
If possible the stream should work for more than 1 connection.

Has any body an idea for this?
Every hint is welcome!


Cheers!

Statistics: Posted by QRM — Tue Sep 11, 2018 5:58 pm


Hello friends . What is the best sensitivity in the SNR … Is the HACKRF or RTL SDR I am working on…

Hello friends . What is the best sensitivity in the SNR ... Is the HACKRF or RTL SDR I am working on frequencies from 400 to 470MHz in SDRSHARP

(RSS generated with FetchRss)

Hello friends . What is the best sensitivity in the SNR … Is the HACKRF or RTL SDR I am working on…

Hello friends . What is the best sensitivity in the SNR ... Is the HACKRF or RTL SDR I am working on frequencies from 400 to 470MHz in SDRSHARP

(RSS generated with FetchRss)

I want to show this to kids this coming summer but have a few questions

I am a science teacher and lurker here. This coming summer I am making a space program for summer reading and usually take it to about 30 libraries. It would be really cool to be able to produce an image on demand during a program.

Would this be possible during a 1 hour program? Does it take a lot of attention or can I just set it up and pick up signals? I am studying for the ham radio licenses anyway, a lot of that equipment overlaps with this correct?

I guess I am asking what goes into capturing these images.

Thank you in advance.

submitted by /u/s-c-i
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Troubleshooting Help • Basic pothos topology for TX

Hi,
For several months now, since I purchased LimeSDR Mini, I have been unsuccessful at transmitting.
The plan is simple - I have a I/Q stream from virtual soundcard (L = I, R = Q) which I simply need to "place" on the band.
Turns out that such task is so difficult that
nobody on MyriadRF responded
nobody on pothos-flow responded
and not even some members who might have an insight into this. :(

TX under windows is very limited for Lime platforms, the only "stable" way to do it is through PothosFlow or supplied GNURadio.
SDR Console v3 "promised" TX support for Mini in Dec 2017. No news.
SDRAngel doesn't work on Win for LimeSDR Mini as there's "issue with Zadiq installation".

I tried TX under Ubuntu, this time with real values not I/Q, namely using SDRAngel. It worked for analog audio, to some extent, but as it dropped samples like crazy, my COFDM stream was unreadable. This persisted on multiple PCs, hinting that CPU is not an issue there.

I realize this product is not meant to be substitution for any commercial grade transceiver, and that experimentation is a key here, but MAN if you're hitting the wall so hard from an early start, it gets demotivating quick.
Supposedly to operate SDR TCVR, you are expected to be proficient in DSP, filter design and electronics from the very start.

Can anybody please help me with this?
It would literary made my day to see the I/Q stream readable and on-the-air with no images, aliasing or distortion.

Statistics: Posted by wqcr — Tue Sep 11, 2018 2:26 pm


Помогите распознать цифровой сигнал. Это D-Star ?…

Помогите распознать цифровой сигнал. Это D-Star ?
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