Here is an IQ plot application, tune a transponder (ie using tune-s2) then run this app and you'll get a constellation plot output. You *can* run the app while a tp is attempting to tune but honestly the stv0900 jumps around so fast trying various attributes that almost certainly you wont get usable data from it.
This is an example of an 8psk plot, my cband dish is pretty small so the signal isnt very clean, but gives you an idea.
here is the link to the src for the app as well as the required kernel patch's
Saturday, August 11, 2012
Here is a simple spectrum analyzer app for the stv0900 devices in linux, works with my Prof 7500. Should work with others but send me a shout if your using another device and how it works out for you.
here is the link to the src as well as the kernel patch's required.
The stb6100 has a hardware limitation of a bandwidth minimum of 5mhz so you'll never get the same detail from a Prof as you would a device designed for use as a spectrum analyzer. As you can see compared to the blsa.