MrMorden wrote:Yes, I got it. Dual band receiver means you might still get reception if the transmitter on one band of a ground receiver is out. That is a good thing to me.
I'm still not sure you've got it and I could be mistaken but......let's see if we can clarify this for everyone. There are 2 bands, 978 and 1090 for both
IN and OUT ADS-B.ADS-B IN:
1090 ES IN
receives air to air traffic and data uplink traffic from ground towers, no weather. (unless you have ADS-B out to wake up the ground towers you'll only receive air to air 1090 traffic who have 1090 out in their aircraft, ie GTX-330ES transponders, and nothing from the ground towers)
978 UAT IN
is traffic and weather broadcasting on the 978 band. This is from other 978 traffic or weather from the ground towers.ADS-B OUT
1090 ES OUT
is for turboprops and jets who fly above 18,000 feet and internationally. This is NOT us.
Can we "see" this traffic when they are in range of us, of course since we have 1090 IN on our GDL-39 or Echo UAT.
is for GA aircraft below 18000 feet. That's why the GDL-82 is only single band 978 out. This is also why the Echo UAT is 978 out. We are required to have 978 OUT only by Jan. 1 2020.
Even with a dual band RECEIVER
like my GDL-39 3D or Stratus you are not seeing the complete traffic picture around you. You need a 978 UAT OUT
transmitter to wake up the ground stations to transmit the complete traffic picture to you. It's not a matter of reception.