I have the output of a MiniCircuits ROS 1500 VCO (output approx 9dbm) feeding into a MiniCircuits LFCN-1325 low pass filter. In the stopband the VSWR of the filter is 40. Since this will cause large refected signals in the stopband, and since the first harmoinic of the VCO is at about 0dbm...
My circuit has a two Minicircuit VCOs driving the RF and LO ports of a Minicircuits mixer. The VCO signals are very clean when tested separately, but when I hook them up to the mixer and connect the IF port to a spectrum analyzer there are all kind of unwanted components. The IF is at 1Ghz. I...
