I am using AD-FMCOMMS-5 board with ZC706 board. i have installed linux in memory card and i am using GNU radio installed in linux. i want to transmit a signal from any one of the transmitter of AD-FMCOMMS-5 board. The bandwidth of transmitted signal is 10MHz but when see the spectrum of transmitted signal in Spectrum analyzer it shows 80MHz bandwith. i am attaching the snapshot of transmitter architecture and captured signal.