At a high rise in Lakewood, my best guess would be the typical "simulcast distortion" response... Multiple towers that are line of sight, and scanners that can't properly receive CQPSK.
Yagi antennas and/or attenuation may help in many circumstances (but it's no guarantee).
I have found two solutions, but neither is ideal...
One is a Unication G4 or G5 "Pager"... That will run you at least $565 bucks at the moment, and it has some pretty major limitations when used as a scanner... But overall I love how well it receives. Much better than any scanner.
Or, for around 20 dollars, you can buy a RTL-SDR dongle, throw Ubuntu Linux onto your computer, and then install OP25 (which is not an easy install... but works great once you get it up and running).
Quite frankly, until a scanner manufacturer finally decides to address CQPSK, I'm done buying scanners... That money will instead go towards more dongles, and more mini-pc builds using Ubuntu MATE and OP25.
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