We constructed a device to excite and detect magnetostatic modes in. slab ferrite samples for frequency range of 2-8GHz. Using this device, we set up a system to measure relation between frequency and applied magnetic field for magnetostatic waves. This system can be used to study not only the magnetostatic waves, but also the basic properties of ferrites. It is similar to FMR. However, the samples need not to be put into a microwave cavity, thus the system allows one to make measurements during some sample treatment.