Why is there such a large (half mile) - even excessive - radius lockout for marked false alert locations with the Beltronics STiR / Beltronics XRC Plus / Escort 9500ci? I think it's due to the existence of X-band radar in the USA. K-band transmissions from door openers do not travel very far. However, I can recall extremely long duration alerts from X-band motion sensors (here in Oz), back in the eighties.
It looks like a "one size fits all" approach from the Bel/Escort engineers. I am speculating that without X-band to contend with, the lockout radius (just K-band) could be reduced substantially.
The half-mile (750 meters) "radius" for locked out "locations" is way too excessive for the Beltronics XRC PLUS sold in AU and NZ.
When photo radars are positioned near false-alert locations (probably inadvertently), sometimes the K-band frequency block (door-opener) that is locked out may coincide with the police-radar frequency. Result? Spinning satellite icon and no audible alert when passing the photo-radar speed trap.
I realize that the lockout radius may be less than 750 meters in practice - if lockouts are done manually. However it is definitely excessive for Oz and NZ circumstances. There are nil K-band mobile radars in NZ and very few in Oz.
There would seem to be several software modifications that Belscort could initiate to reduce the very real danger of actual speed-radar being locked out.
(1) Rewrite the software to create a smaller lockout radius for K-band.
(2) Rewrite the software to provide several levels of lockout radius that can be accessed in the user menu. Say "Ra1", "Ra2", "Ra3"?
(3) Rewrite the software to offer a choice of "alert" patterns when "locked-out" locations are passed.
- - - (a.) Complete audio-mute and no visual alert (as is now extant)
- - - (b.) Triple "beeps" (sharp pip please) followed by audio-mute with visual alert.
- - - (c.) Single "pip" followed by "soft-click" with visual alert. The "clicking" would reprise the superb audio-mute sound that was used in the 1980's Vector series.
This is the best solution to the "missed alert" situation that is a problem in areas where low-power (K-band) slant-radar is used. Right now it is Oz and NZ. Increasingly it may be states of the USA.
When Belscort make these desirable (and needed) modifications, users can upgrade their devices through the Internet. Perfect solution. Go to it "Belscort".