On Friday, October 5, 2012 1:35:50 PM UTC-7, wrote:

$adsb,configure,mtlac,300 $pflac,s,pcasrange,9000


From the ADS-B module data port specification:

MTLAC 64 to 800 Mode-A/C minimum triggering level.


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.

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


Andy GY