Архив за 07.03.2018

Comment on R820T2 Chip Discontinued: Low Cost R820T2 RTL-SDRs will Continue, Airspy Will Redesign by Wolfgang

Technik im Amateurfunk
● Elonics E4000 52 – 2200 MHz with a gap from 1100 MHz to 1250
MHz (varies)
● Rafael Micro R820T 24 – 1766 Mhz
● Fitipower FC0013 22 – 1100 MHz (FC0013B/C, FC0013G has a
separate L-band input, which is unconnected on most sticks)
● Fitipower FC0012 22 – 948.6 MHz
FCI FC2580 146 – 308 MHz and 438 – 924 MHz (gap in between)

https://www.darc.de/fileadmin/_migrated/content_uploads/SDR_Stick_neu.pdf

Comment on R820T2 Chip Discontinued: Low Cost R820T2 RTL-SDRs will Continue, Airspy Will Redesign by Wolfgang

R820T
High Performance Low Power
Advanced Digital TV Silicon Tuner Datasheet

https://www.rtl-sdr.com/wp-content/uploads/2013/04/R820T_datasheet-Non_R-20111130_unlocked1.pdf

Comment on SDR# TETRA Plugin Updated: No longer requires MSYS2 by nono

Alot of tetra networks are encryped with the TEA standard, is there some addon of utility availible to solve this.?

Comment on R820T2 Chip Discontinued: Low Cost R820T2 RTL-SDRs will Continue, Airspy Will Redesign by David

What are the design tradeoffs of including the low frequency SWL/HAM bands in these? Say down to 3 MHz. I imagine there is some technical or coast reason.

Comment on SDR# TETRA Plugin Updated: No longer requires MSYS2 by Zox

I get this error when starting the Demodulator:
—————————
Sender to tetra-rx – An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)
—————————

Windows 10 64-bit, SDR# .1655 64-bit and the 64-bit plugin downloaded from this page

Comment on R820T2 Chip Discontinued: Low Cost R820T2 RTL-SDRs will Continue, Airspy Will Redesign by Rod

No. I’m a customer. But I buy R820T2 IC from China authorized distributors.
So, the problem remains and is real. RAFAEL MICRO doesn’t answer customer’s requests properly.

🙁

Question about space probes and the data sent back to Earth?

I've always wondered what frequencies are used by any of the craft we send into our solar system and what digital mode is used to send back the data to Earth.

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

I’m looking to find a good general purpose antenna for Chicago. I listen to Police and Fire, Air…

I'm looking to find a good general purpose antenna for Chicago. I listen to Police and Fire, Air traffic mainly news choppers and ORD approach, and also like to scan up and down all the frequencies just searching for interesting stuff. I also live in a apartment on the 6th floor so it mainly limits me to something I can stick in the windows or attach to a window A/C unit. Thank you in advance for any help.

(RSS generated with FetchRss)

На коллинеарную антенну.

На коллинеарную антенну.960
960
960
960

Comment on R820T2 Chip Discontinued: Low Cost R820T2 RTL-SDRs will Continue, Airspy Will Redesign by prog

More precisions about the situation. We sampled new reels of the R820T2 before launching bigger batches as usual and discovered that the quality is not the same as before. Rafael Micro confirmed that they moved the extended production to another fab for the discontinued parts. I suspect the change in quality results from the quality of the silicon. This might be OK for the ultra cheap dongles, but it does not pass the rigorous testing we have in the Airspy production.
The question is more about the quality of the last few runs of R820T2 than our ability to purchase high volumes. These thingies cost less than $1/piece in volumes.
Time to move on.

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