My father gave me a Heathkit SB 610. I am not sure what it is for. I
have no instructions and my father doesn't talk much.

Is it for monitoring incoming signals?

It has lots of buttons. I notice I could control this light green line.

It has two openings for the Pl 259 coax. It it for radio and antenna?

It's a cool looking thing. But still, help!

SR!