Radarspotting

Here an idea that would be great and might fix the doughnut hole problem. I see you can the Rx power level in the audio radio tuners. Any way to see if the Rx level for the ADS-B radio get maxed?
Later

I didn't think the SBS-3 had a "doughnut hole" problem?

 I'm willing to be corrected if wrong WHICH I often am. RX power  not issue ANTENNA is (pre-amps)

                                                                  Billko

 I like the coverage I get on the 9 db ads-b antenna. I believe when the airplanes are close to me, the input power level is to great for the receiver. I was hoping a there was a rec power # or led/software icon could let me know if the Rx level was maxed. I could then insert loss into the cable.
Later

Mixism I dont know if you are suffering breakthro if you are you need  to attenuate the strong signals

I have some pad. I just have no clue of how much is  the right amount.
Hope and poke is not the way  ;D
Later

PAD?
:-\

The so called dough-nut effect appears generally by high again vertical antennas,
either multi-elemented collinear or as a stacked array.
In anyway not by a receiver (unless incorporated w/i such antenna design)
The higher the gain (horizontally) the more flattened that lobe is,
which means that upwards the ant is less effective.
But have in mind you reach out for some 250 NM to the horizon
and there are only 11 NM straight up to be at FL 660 already.
OK that can be even be a null right in the zenit.

I do not think that saturating the RX front end is likely,
as some people use the Kuhne Preamp (20 db ) far more gain than they actually need.

IMHO if you are really missing flights in the vicinity overhead
is switching to a more moderate antenna.

regards

You need one of these  http://www.scannermaster.com/ATT_20_Variable_Attenuator_p/24-531021.htm