[Discuss-gnuradio] What is USRP oscope showing me?

[Chris Stankevitz]

Hi,

I'm new to radio and I have a lot to learn.  I have a question about 
oscilloscopes and the usrp_oscope.py.

I believe the following.  Please correct me where I am out to lunch. 
There is a strong 103.3Mhz FM station in my area.  Connect an antenna to 
a band pass filter that passes 103.3Mhz +- a little bit.  Plug the 
output of the filter to an oscilloscope (a real one) and you will see a 
103.3Mhz wave.  Note: you do not tune the oscilloscope.

My questions about usrp_oscope.py:
How do I see the carrier wave at 103.3Mhz?
What are the units of the Y axis?
Why does it want to tune?
What is usrp_oscope.py showing me?

Thanks!

Chris