[R-390] poor man's sweep generator

[Helmut Usbeck]

I've been using a program called Spectrogram, 
www.vistualizationsoftware.com, for a while now.

What I do is run the program, and take the output of the r-390a=
 or 
any other receiver and input it to the soundcard of my computer. =
 For 
a signal "injection" tune to a spot where there are no stations. =
 Use 
the noise input from the ant. or a diode noise generator.  One=
 will 
see the bandpass of the filters displayed on your computer=
 screen.  
I've used this with several receivers to compare bandpass of=
 filters 
slopes of filters and also to adjust them.  Yes, there is an 
improvement.

Helm.  WB2ADT