Архив за 05.03.2019

Using rtl_tcp to monitor and adjust settings while capturing outgoing tcp traffic on host — possible

Hi there, is it possible to capture the output of rtl_tcp on the host device to decode it right there?
I can change the settings on the remote client with sdr#, but the connection is way to weak to actually capture something. I'm running a raspi 3 on the attic and i'm a few 100km's away.

submitted by /u/dokimus
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Comment on Android App: Phonetic Alphabet Trainer by Tysonpower

Well, People that use SDR also often listen to Ham Radio transmissions.

So knowing the Alphabet will help to understand who is talking on these HamRadio cintacts.

Comment on High End Per Vices Cyan Software Defined Radio Released by Fred

Thanks for getting back to me and my criticisms.
Its typical to post RF bandwidth and Sample rate. In your spec sheet you have Sample rate and “RX Sampling Bandwidth” which is set to be the same as the sample rate, not sure what the purpose is there. It doesnt feel nice that we have to go digging to know what RF bandwidth we can get out of this expensive device. Also, does the IQ down converter change when upgrading the ADC to the 3Gsamp variant?
The truth is there is nothing comparable in the market. I am trying to figure out the business case. Technically, especially when all the channels are populated, it is an impressive accomplishment (although that opinion is pending more in depth RF metrics). Though for 1 channel it seems like I would be paying for a lot of hardware I have no need for (Huge FPGA, 4 40G interfaces and all that is needed to support that, what must be an impressive clock distribution for all the channels I wont be using, Power delivery ect.) For one channel it wouldnt be hard to build this with off the shelf subsystems and get likely better performance for what I need it for. In this price range you arent going to get people who are just looking to “play around”, they are going to have a specific need. Unless that need is to use the entire frequency range and bandwidth you provide then it wont be hard to create a system that caters to their needs for a much cheaper price and without the hassle of this 40G backhaul.
When I ask myself the question “Why isnt there anything else out there like this” I am less inclined to think that its because no else is capable of doing this, and I am more inclined to think that there is no need for it. The cost of trying to be good at everything (as an SDR needs to) with that channel count, that frequency range, and that bandwidth is far to great as you have demonstrated, it is far more cost effective to build something specific to your needs, and likely do it better (ex. out of band filtering). And again, this point becomes much more salient for the 1 channel case where phase coherency and synchronization is not a factor.
Earlier I asked if the FPGA was open as perhaps someone can make use of that massive FPGA to do some crazy low latency DSP… but if its not open then… whats the use case, who would buy this and for what purpose. Above you noted that one of the benifits of this product is that it doesnt have limited FPGA resources, my question would be what are you doing with the FPGA resources? If I am buying Cyan it means Id want access to very large bandwidths meaning there isnt much needed on the FPGA in terms of DDC or DUC.. Filters can be costly, but not that costly…
Anyway, as I said, likely (pending RF measurements) an impressive technological accomplishment. I just dont understand the “why”.

TV Tuner doesn’t work with SDR#

So my Paddsun tuner came in, and when I went to plug it in, it would not work. It is not detected by SDR Console or SDR#. I chose Realtek RTL2832U in the dropdown menu, selected usb, and hit play. It said No Device Selected. SDR Console has no idea what this is either. ANy suggestions? I did run Zadig.

submitted by /u/German_Camry
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TV Tuner doesn’t work with SDR#

So my Paddsun tuner came in, and when I went to plug it in, it would not work. It is not detected by SDR Console or SDR#. I chose Realtek RTL2832U in the dropdown menu, selected usb, and hit play. It said No Device Selected. SDR Console has no idea what this is either. ANy suggestions? I did run Zadig.

submitted by /u/German_Camry
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Antennas • Re: diy double biquad antenna for ads-b photos

downhttps://www.rtl-sdr.com/forum/downl ... be1d6a8018
IMG_5405.JPG

IMG_5404.JPG

IMG_5413.JPG

Statistics: Posted by plankowner1971 — Tue Mar 05, 2019 8:54 pm


Antennas • diy double biquad antenna for ads-b

im replacing a diy biquad with this double biquad and getting better than expected results,.besides a higher pane count with virtual radar, i can now plot aircraft beyond the 200 mile range. the antenna is mounted on a 15 ft mast with an inline rtl-sdr blog filtered lna. the relector is cut from a side panel from a desktop computer. will try to get some photos poste.

Statistics: Posted by plankowner1971 — Tue Mar 05, 2019 8:49 pm


Help with receiving a NOAA Signals with V single dipole antenna

I need help to receive signals from the noaa, with this antenna I do not know if I'm doing it right, any recommendations?

My antenna: https://imgur.com/a/Fmd3Uxi

My images: https://imgur.com/NM0KJZS https://imgur.com/6web4Et

submitted by /u/echo7722
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Тут такое дело.. Спалил я один из своих свистков, точнее микру r820t, но 2832…

Тут такое дело.. Спалил я один из своих свистков, точнее микру r820t, но 2832 рабочая.. Какие есть идеи использовать оставшееся железо? Думаю заюзать трансформатор rj45 и исользовать в режиме direct sampling
Еще у меня есть мертвая плата универсального скалера на r842, даташит не нашел.. Нашел только пинаут на r840.. Как думаете, взлетит или нет, совпадут ли протоколы?) все таки тюнер уже с dvb-t2/c

Has anyone used GPIO Labs’ LNAs?

I'm looking for a LNA for my hackrf that supports the full spectrum and ran into this one https://www.tindie.com/products/gpio/low-noise-amplifier-10mhz-to-8000mhz-w-40-db-gain/

Has anyone here used one of the GPIO Labs LNAs?

submitted by /u/Plasma_000
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