Not that I can help but I haven't experienced that problem with my
Stemme. My transponder antenna is on the under side of the carbon nose
bowl and the PF antennae are on top of the glare shield. Maybe the
carbon blocks the transponder signal so the PF doesn't "see" it directly.

On 7/12/2017 8:34 AM, John Carlyle wrote:
I’ve been trying to get the rate of "own transponder detection" by my PowerFlarm Core as low as possible. Nothing I’ve done has improved it beyond roughly every 10 minutes, on average. Sometimes it’s much worse, showing up almost constantly. Turning off PCAS isn’t really an option for me, so I’d like to know if it’s possible to get a lower false alarm rate.

QUESTION - If you have a PowerFlarm with the PCAS function turned on, what false alarm rate are you getting? If the period is longer than 10 minutes, what did you do to get it (configuration settings, antenna placement, area you fly in)?

For reference, I’ve been working on this problem in both my old LS-8 (with a Mode S) and my new one (with a Mode C). Both ships used the same PowerFlarm configuration file settings, except for XPDR and MODESALT (both were set correctly for each ship). OWNMODEC was set to Aggressive in both ships. The PowerFlarm and transponder antennas were in the same position in both ships (glare shield and tail boom, respectively) and the PowerFlarm Core was the exact same unit for both ships, too.

-John, Q3

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Dan, 5J