USB Stick Mode-S Receiver

[SunCobalt]

Thanks for your help!
GNS responded that it has MCX (Mini Coax) connectors on both sides (one male, one female). I found some online shops that have the connectors but it limits the available cables.
Regarding the "doughnut affect": I will make some test once I am more familiar with it. As mentioned I have STR around and I live less than 5km away from the corridor that is used for landing.  It should not be too hard to find it out

[Anmer]

Thanks for the feedback.

The 1090 antennas often have an N-type connector.  Depending what coax you use, it could have a BNC or SMA connector at the receiver end.  Try and find an adapter for the MCX.

[SunCobalt]

I have heard that the GNS 5890 suffers from the "doughnut affect" where the signal from aircraft overhead is lost.  Maybe you can let us know if you have the same problem?

I have a question how to measure the "doughnut effect". How you mean"overhead"? Directly? The two rings are 10 and 20nm but I can receive planes at different altitudes in there (please see below). If you tell how to measure the "doughnut affect" better, I will do it.

(Don't wonder about all the red (shared from PP) planes in north. The antenna is not at my roof but at the ground and my house prevents the antenna from receiving a signal from north.)

[Anmer]

I haven't experienced this myself as the SBS doesn't have this problem.  But if you see an aircraft flying overhead, it should disappear off the screen and then reappear after it has passed.

Maybe you aren't having a problem.

[Bill]

Just a quick information about the so called   "donought effect"
GNS announced that they do not have any donought effect after SN: 092422  http://www.blog-ads-b.gns-gmbh.com
Before that serial number a donought effect  is happened but you can compensate this with the Voltage reference using the program
adsbscope. But you will lose range  With the newest version GNS5890 V3.0 the donought effect is compensated by hardware.

So if you near by an airport you will see that some Airplanes are not recognized. The donought area is more than 10km maybe 15km-20km.  The result is that you will have problems receiving ADS-B messages in that area also flights in 10km overhead!

If you need a BNC Adaptor for the GNS5890 do not hesitate to shoot me an email ;-)

Another point:

Because of comparison of other "Sprut" based ADS-B receiver like microADSB.
Our Version 1 was also based on the same Hardware and Firmware. Generally we were happy with the result and framerate.
But......

We have bought an ADS-B frame transmitter and we saw that the framerate is not ok. The GNS5890 is able to receive any ADS-B messages and is fast enough to decode any message we are not loosing any message . The reason for that is that we have developed our own firmware directly in Assembler. What we can´t do is that we can not decode overlapping messages... so because of that receiver concept we do lose a few messages because of overlapping but we will get them maybe a second later.

For Version 3 we have changed also our Hardware concept so there are a lot of differences between GNS 5890 and microADSB
Also the GNS5890 is CE and FCC proofed

Regards

Bill

[Anmer]

Thanks Bill for the update.

I assume you work for GNS?

[mezoo]

Just a quick information about the so called   "donought effect"
GNS announced that they do not have any donought effect after SN: 092422  http://www.blog-ads-b.gns-gmbh.com

Bill,
My unit is SN092414 - so I just missed the change. Pity as I live close to EDLW

One question - when using it with my desptop I am need a USB extension cable as the antenna cable is to short to get to the window

The unit runs perfectly. However after a while, particularly when unattended, it will go dead and the programmes report a COM Port error.
So I unplug cable, insert in a different USB port and restart the programme, select the new COM port and everthing works again for a while.

In another forum this was attributed to a poor quality USB cable - can you confirm this ?
Would it work better with a quality USB cable or an active USB cable ?

It would explain why the GNS runs perfectly on the laptop where it is connected directly to the USB port.

[mezoo]

Looks like the problem with the unit going dead was not related to the USB extension cable cable or Windows after all - but to something more fundamental.

Somebody suggested to check the energy saving settings for the USB ports in the BIOS.
With the energy saving turned off in the BIOS the unit has been running perfectly, unattended and without interuption. Even with my cheap USB extension cable !

Somehow the BIOS gets overlooked in todays flashy computer world - wouldn't have happened with my 486 with DOS 4.01 

[viking9]

I don't understand all these references to manufacturers stating that their 1090MHz receiver does not suffer from 'doughnut' effect. It's the antenna that suffers from the effect, not the receiver. All dipole antennas radiate in a doughnut (toroid) pattern, which becomes flatter (squashed) as gain is increase.

I'm blowed if I can see how the receiver has any effect on it.

Tom

[shakysen]

Hi Tom. Maybe this site can help with its the antenna    http://nzradar.com/?p=1581

[shakysen]

Hi All. Just finished playing with homebrewed X DIPOLES WITH 1/4 WAVE FEEDERS at 75 ohms .Heard planes over head on VHF .Dipoles flat side.
Wonder if they would work for 1090? May have a go and see 2.1/2 ins elements .

[mezoo]

Looks like the problem with the unit going dead was not related to the USB extension cable cable or Windows after all - but to something more fundamental.

With the energy saving turned off in the BIOS the unit has been running perfectly, unattended and without interuption. Even with my cheap USB extension cable !

Well it turned out that the BIOS was not the only culprit.
Bill mentioned in another forum that the the receiver outputs to the COM port at 115200 baud and that some USB ports cannot handle this speed.
I checked the settings in the Windows hardware manager - my Windows was set with a COM port speed of 9500 baud.

Now I changed all COM ports to 115200 baud.
Since then the unit has been running without any interruption - with the extension cable and power saving settings back to standard settings
(You have to change the settings as administrator in order for them to be permanent.)

[Phantom2]

Hi all

I have just installed my GNS 5890 on my ASUS EeePC 110PX with Intel (R)Atom(TM) CPU N570 at 1.66GHz with 2.00Gb of ram and get get a peep out off the decoder. I have tried all three USB ports, and both COM ports adsbSCOPE software.

any ideas please ?

cheers IanG (Phantom2)

Just answered this myself ..had to install the drivers from the device manager as an administrator ...cheers

[Anmer]

Have you tried using the PlanePlotter free 21 day trial?

[3eluga]

Hi, I just installed GNS 5890 and AdsbScope. It works pretty good together, but when I try to setup PlanePlotter there's one problem I couldn't figured out : The dialogue box of the PlanePlotter's setup wizard doesn't have GNS5890 checkbox  (there are SBS, Airnav, beast, etc. but no GNS5890) so I just stuck there. What can I do to successfully set up this program and make it work?