Phabrix PHQXPO-GEN SW Option - SDI/IP AV Test Signal Generator (SDI req. PHQXP01-3G or PHQXP01E-3G). When an SDI option is fitted, together with the Audio/Video Test Signal Generator software option (PHQXPO-GEN), the unit includes both Generator and Analyzer, which enables you to loop the Generator outputs back to the corresponding Analyzer inputs.