Calls outside your coverage area...

[SF]

It sounds like you probably had to be there, but, as a general rule of thumb, I wouldn't call anything in my partner's coverage area unless I am sure of the call (sounds like this was not a problem here) and I am absolutely positive my partner didn't see it (I think this is what your question is-wait a second to make the call, instead of just blowing the whistle right away). The reason it's your partner's zone is because they are closer and can see things you cannot. In the areas where the zones sort of overlap, it's not as big of a deal as if you call something right in the middle of your partners zone. That's where you get "blarge" calls and such.

If that's the only thing you did wrong all game, you should be proud of that.