Andy,


A continous stream of airliners passes over my house. What I normally see is that PF PCAS function does not detect them until the range is about 2 statute miles. However, after they have first been detected, they remain displayed until the range reaches 6 statute miles or more.

Is that with the device indoors? ADS-B targets (trianges) or Mode C/S (circles)?

I'll try changing MTLAC and report if it makes any difference.

I recommend to leave it above 250 (both Mode S and C). Please let me know how it goes.

FYI, Mode S XPDRs also reply to Mode C interrogations.

PCAS is limited to 5 NM (the configurator has this wrong unfortunately,
we'll fix that ASAP), trying to set a higher PCASRANGE is ignored.

Best
--Gerhard

--
Dr. Gerhard Wesp
Development Manager, Avionics
FLARM Technology GmbH
Switzerland
CH-020.4.033.059-8