480 band, it should be 3mhz higher. However, it's line of sight, so unless you're in the immediate vicinity all you'll hear is a faint carrier and a lot of noise. We're probably better off on the base.
Come to think of it, that LAPD "direct" mode works by switching the car transmitter to the base frequency. Capture effect results in the base being able to override it when needed.
By the way, we can hear the beeps from the scanner as it's programmed, it's become famous!!!