UHD : USRP Sink with multiple channels

Hi Everyone!
I want to see how the grc execution output looks when usrp sink has
multiple channel [Numbers of channels > 1]. I dont have USRP so I cant
not execute and see how does it look? Please run in your system and send
me Snap shot :frowning:

Or if there is any example by which I can run and simulate such a
example then show me please!