eton elite 750

I purchased a "nearly new" Eton Elite 750 on eBay and received it today. The RF knob is really stiff but it's not a deal breaker. However, when listening to it with two different sets of headphones, I noticed a high pitched staccato noise, almost like morse code coming through. I could not hear...

I've looked at the Eton Elite 750 in the past, but honestly was not too interested in it. However I heard today that one guy uses it to scan the police bands. Can this radio actually be used as a scanner too? If so, I may have to re-think this.