Архив за 10.10.2018

Signal Identification Help • Re: Unknow signal

It's Mobitex:

https://en.wikipedia.org/wiki/Mobitex

I got dozens of these signals in my area:

Image

About 15 years ago police and ambulances used this system for the data terminal+screens in their cars... It was all clear text back then when I used a 2-level modem on a scanner with discriminator tap.

Another example (not my video):

https://www.youtube.com/watch?v=dEtB2H6OU1k

Statistics: Posted by Remon — Wed Oct 10, 2018 10:44 pm


Signal Identification Help • Is this a weather balloon?

I found this strong signal in the low 400MHz's:

Image

Audio:

https://instaud.io/2MLh

Statistics: Posted by Remon — Wed Oct 10, 2018 10:13 pm


Troubleshooting Help • Re: RTL-SDR and Ubuntu 14.04

For those who come here from a Google search trying to disable their SDR.

CODE:

rmmod dvb_usb_rtl28xxu rtl2832
Works great, but it's temporary and resets when you reboot. If you want to permanently disable the dongle, add this to a new modprobe blacklist file (like /etc/modprobe.d/sdr-blacklist.conf).

CODE:

# RTL SDR gets in the way of the TV tuners.blacklist dvb_usb_rtl28xxu

Statistics: Posted by fossum — Wed Oct 10, 2018 9:57 pm


Other SDR Devices • Re: Why Tx/Rx devices are so expansives ?

Smartphones are generally using a chip with does all the TX.RX functions, and normally it's a hardware radio, with no IQ output. So it can't be used as an SDR.

Statistics: Posted by rtlsdrblog — Wed Oct 10, 2018 8:19 pm


Hurricane Michael seen by GOES-16 on 2018-10-10

Hurricane Michael seen by GOES-16 on 2018-10-10 submitted by /u/pietern_
[link] [comments]

Добрый вечер!Есть вопрос, имеется список усилителей для возможного…

LNA_AMP_List
Добрый вечер!
Есть вопрос, имеется список усилителей для возможного использования в модуле МШУ, какой бы усилитель из представленных в списке Вы бы выбрали для использования в конечном устройстве?
Интересует именно мнение как конечных пользователей, т.е. те характеристики, которые необходимы конкретно Вам.
Заранее спасибо за помощь.

Ссылка на список усилителей:
https://docs.google.com/spreadsheets/d/1-iHON7Q1u4PWNO26kw14oB-pszZdEacVnzLlJyXhJ7o/edit?usp=sharing

Hurricane Michael Meteor M2

Hurricane Michael Meteor M2

QFH/Preamp/RTLSDRV3/Tinker Board

https://i.redd.it/tn78o9kdedr11.png

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

Is RG6 good enough for a NOAA antenna?

Hello. I'm planning on building a double-cross dipole antenna for NOAA reception, and I was wondering if RG6 is a good coax cable to use for connecting the antenna to my SDR. I know theres better coax out there, but its far more expensive and I would have to order it online, where as even good quality RG6 is more affordable and theres places around where I live that sell big spools of it.

Ideally my plan is to have my antenna mounted on a mast in my backyard, and then run around 100 feet of cable down the side of my house amd into my room where my computer is.

Thanks for the help.

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

Other SDR Devices • Why Tx/Rx devices are so expansives ?

Hello,

I was wondering why those devices are so expansives, i mean even the cheapest one are like 150€ minimum (http://www.analog.com/en/design-center/ ... b-overview).

If i ask this question, it's because cheap smartphone cost like 40€ or even below. And those smartphones are capable of Tx/Rx at GSM,3G,4G,LTE etc... So sorry, i'm a beginner, but i was thinking " Why don't they extract GSM chip of those cheap smartphone to do their usb transceiver"...
How can a constructor provides smartphones at 40€ with Tx/Rx capability and other cool stuff integrated like wifi, bluetooth, keyboard, operating system etc...

Thanks for your help :)

Statistics: Posted by kelegaya — Wed Oct 10, 2018 5:00 pm


Troubleshooting Help • Help with Unitrunker

Has anybody gotten the new newest version of unitrunker to work .
I am having problems with getting the Unitrunker to work . I have done everything that is in the quick start guide and it's at step # 8 when the play button is pressed is were the problem is . I am not getting the next window to come up . I do get audio and the signal is good and strong , sound like a p25 signal . Is it possible that their is a usb driver plugin that isn't talked about in the quick start guide that is needed ?

Statistics: Posted by victornguyen — Wed Oct 10, 2018 3:46 pm


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