To read the return sweep, you required a 860-DSPi for the field with the option SSR installed in it.
You also have to set a communications frequency between the 9580 and the 860, I usually use 75.3 MHz
This frequency has to be programmed in the 9580 and the 860
You also have to enter at least a couple of return frequencies (between 5 and 40 MHz)to do the weep fonction.
You can program as much as 8 frequencies for the return sweep.
Picture of what it look like in the 860 is attached to this.
You can also have access to the return sweep result thru an IP address and a software from Trilithic.
E-mail if you require more information.
