[R-390] "Visual" alignment with a computer and a sound card...

[Kenneth G. Gordon]

OK. I talked with one of our GB guys about this. What you need is a 
spectrum analyzer program like Spectogram, which is written by a ham, 
BTW, and a fairly decent computer with a sound card.

You then connect the sound-card's mic or line input to the output of the 
receiver's detector.

Using the proper settings in Spectogram, you will see a perfect 
representation of your receiver's passband when the receiver is hearing 
just band-noise. If it were me, I would use one of those simple noise-
generators we used to use to align VHF pre-amps.

I will forward on to this list the message I got from Ron D'Eau Claire 
which talks about this in greater detail.

There are other pieces of software available on the net which work 
almost as well.

Ken W7EKB