Hey
What kind of chips for the ADS-B SDR use it?
thx
SDR in the SBS-3 is implemented in a FPGA, the main manufacturers are Xilinx and Altera so it's probably manufactured by one of those companies.
I'm not sure what advantage knowing the chip type will offer you though!
A friend mean with this SBS-3 he can receive more Aircraft that me with my T2 Dongle. ;D
That's really not a surprise, the SBS is custom designed for the job it does and the cost reflects this.
Dongles are a great addition to the hobby giving a cheap and very worthwhile means of receiving a variety of aviation radio signals, but they will never be as good as a decent purpose built receiver.
If you want to improve reception without going to the cost of a SBS then the things to look at are antenna quality and location.
Cheers,
Keef.
the problem are not the cost. the problem are the software who run on this system.
No, the hardware is the limitation not the software. A dongle contains a chip that has been found to be very flexible and can receive transmissions over a wide range of frequencies. The software can only show what is received by the hardware.
The SBS-3 SDR is designed to receive a limited range of frequencies and therefore it performs better than a general purpose dongle. Again the software just shows the performance of the hardware.
So an SBS-3 or SDR Puck probably performs better for airband than a dongle. But a dongle can receive a wider range of frequencies than the SBS-3 or SDR Puck.
Very well put Ian.
;D
QuoteThe SBS-3 SDR is designed to receive a limited range of frequencies and therefore it performs better than a general purpose dongle. Again the software just shows the performance of the hardware.
I use an Filter and LNA to.
My huge Problem is i use directional Antenna to get the Groundtraffic on some nearby Airports.
That mean i would take 3-4 Recivers
Quote from: Radio2.0 on March 01, 2015, 02:37:49 PM
That mean i would take 3-4 Recivers
In my opinion, a dedicated ModeS receiver and a well positioned ModeS antenna will pick up the aircraft messages from a local airport. You should not need to use a "directional antenna".
no way. ;)
There are may buildings and small hills between me and the Airport.
I use an good Antenna. You shuld know that the Aircraft reduce the output power on the Airport.
Quote from: Radio2.0 on March 01, 2015, 03:07:00 PM
There are may buildings and small hills between me and the Airport.
I use an good Antenna. You shuld know that the Aircraft reduce the output power on the Airport.
How are you able to receive aircraft messages if these obstacles are in the way? They won't bend around them to reach your "directional antenna". Unless your middle name is "Uri"?
Who says "aircraft reduce power on the airport"?
I use an Yagi Antenna for the Airport.
QuoteUnless your middle name is "Uri"?
No sorry i dont have a middle Name.
Thats fact. After the Aircraft touch down the transmit power reduce. Thats why the aircraft are no shown after the touch town.
Just look in FR24. If there nobody near by an Airport you cant see the Aircraft after touch down.
Quote from: Radio2.0 on March 01, 2015, 03:29:59 PM
Just look in FR24. If there nobody near by an Airport you cant see the Aircraft after touch down.
That's nothing to do with "reduced power" and is an incorrect statement.
The attached screenshot shows aircraft landing and taxying at London Heathrow.
[Attachment deleted by Admin to save file space]
I believe there are many People with ADS-B Equipment in the Area.
When you look an small Airports like BTS you see no Ground traffic.
Quote from: Radio2.0 on March 01, 2015, 04:09:28 PM
I believe there are many People with ADS-B Equipment in the Area.
When you look an small Airports like BTS you see no Ground traffic.
That's because on-ground coverage requires receivers nearer the airport - line of sight from ground level transmissions do not travel far.
I still stick by my first post in this message thread.
Quote from: Radio2.0You shuld know that the Aircraft reduce the output power on the Airport.
Wrong.
ICAO Annex 10, Volume 4, Chapter 3, section 3.1.1.7.11 details the power output requirements for transponders. For most commercial aircraft the output must be between 21dBW and 27dBW - that's roughly 126 Watts to 500 Watts. The only exception is equipment fitted to an aircraft that will not operate above 15,000 feet, in which case the minimum power output requirement is 18.5 dBW (70 Watts) - the upper power limit remains the same. A transponder fitted to a ground vehicle may use lower power but there is no such provision for aircraft equipment - output power remains constant, whether airborne or on the ground.