Hi YTCD,
Jimbonzzz, correct me if I am wrong on any of this. Aside from separate oscillators for K and Ka band, the STi otherwise uses the same circuitry for detecting both K and Ka band. If there was a problem with the oscillator for Ka detection then the STi would definitely let you know this.
Yet lets try to test its Ka detection. Many radar detectors will momentarily false on Ka if you drive really close to one or more pairs of K band door openers. I can't honestly recall if my STi does this since I normally turn off my STi when I enter a parking lot. Yet I seem to recall this happening maybe once or twice. Anyway, give it a shot. If it does momentarily false on Ka band then at least you know it is working fine, and that you just have been "unlucky" in encountering police cars who either had their radar off at the time or who were using laser.
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