Архив за 20.10.2018

LRT-SDR V3 in direct sampling mode, is this a common behavior?

LRT-SDR V3 in direct sampling mode, is this a common behavior? submitted by /u/GeoGemstones
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Trouble with Nooelec NESDR SMArt XTR

Trouble with Nooelec NESDR SMArt XTR

I never used this Dongle because I had never need for bias-tee. Since I try to cath some xRPT signal I juste coupled it with Goes LNA (from Nooelec too).

https://i.redd.it/cnjt2zic5et11.png

When the dongle is plug without or with the LNA I got this strange pike in center. I try with my laptop and RPi, with and without usb extension cable and in a lot of differents places (outdoor and indoor)
This does not appear on a given frequency, it's always at the center no matter what frequency I use.
DC remove doesn't fix this too.

So I would like to know if someone got this dongle too and experimented the same problem, and if it's normal or if it's problem with the dongle ?

submitted by /u/supercho7
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Anyone have ideas on what this signal might be? I’ve eliminated DSR and P25, link is to audio, signal screenshot and location in comments

Anyone have ideas on what this signal might be? I've eliminated DSR and P25, link is to audio, signal screenshot and location in comments submitted by /u/MattTheFlash
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Коллеги радиолюбители и разработчики, есть задача: нужно сформировать…

Коллеги радиолюбители и разработчики, есть задача: нужно сформировать сигнал ППРЧ в полосе 80 МГц с шагом 2 МГц и шириной 1,3 МГц. За разработку соответствующего ПО естественно материальное вознаграждение. Сигнал можно формировать с помощью HackRF, LimeSDR либо любым другим устройством. Кто в своих силах не сомневается, пишите в группу, дам контакты заказчика.

Ребят, подскажите что это за данные?Кстати, настройка «Save Preamble» есть в настройках цифровых станций. Что это? Кто сталкивался?…



Ребят, подскажите что это за данные?
Кстати, настройка "Save Preamble" есть в настройках цифровых станций. Что это? Кто сталкивался?

Recommendations for NASCAR races?

I've lurked here for awhile, been a ham for years but never really played with sdr. Went to a race recently and thought it'd be cool to hear what the drivers are saying. I'm guessing they use DMR or something similar. Any software/hardware recommendations for a noob like myself? Also figured I'd throw it up on broadcastify, but I'm not sure how to do that either.

submitted by /u/chodehat
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Comment on Tracking People Through Walls with WiFi Passive Radar by Seasalt

Would this Wifi work on a boat as a short range warning radar.

Would the fact that 2.4ghz frequency is the same as a Microwave oven and boils water be an advantage. i.e. Will the wifi signal transmitted from the boat be absorbed by the surrounding water but reflect off anything on the water.

Currently flying — I can see every FM station for miles and miles. Some stations are even overlapping.

Currently flying - I can see every FM station for miles and miles. Some stations are even overlapping. submitted by /u/jelimoore
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RTL-SDR Discussion • Re: op25 (police radio)

It's been a few months since i used my op25, but from memory, there are keys (poss. the arrow keys) that allow for live fine tuning. Have you tried those in conjunction with the phase plot?

Statistics: Posted by phil — Sat Oct 20, 2018 2:24 am


Antennas • what is now required to get Meteor M2

Hello All.

I have the RTL-SDR V3 Dongle. Also, an advertised Turnstile which somehow I doubt, as it only as two crossed dipole's at the top, there is nothing below that. and a Windows7 Professional with i5 14GB Ram.

The antenna is giving me very good capture's on NOAA, now I'd like to push on to the Meteor m2. What do I need to add, to the above, to give me a chance?

Many thanks,
Jim.

Statistics: Posted by ZL2BMH — Sat Oct 20, 2018 1:32 am


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