Made of fine quality material, practical, easy to operate and use, wide application range, has a long service life. Features: Made of fine quality material, practical, has a long service life. Compact and lightweight, easy to operate and use. This is a vector network analyzer learner tool. Can be used to measure 6.5M ceramic notch filter. Can be used to measure homemade low-pass-filter, 3dB bandwidth about 400MHz. Specifications: Material: PCB Color: green RLC series and parallel circuit 1 RLC series and parallel circuit 2 33 ohm resistance, SWR=1.5 75 ohm resistance, SWR=1.5 BSF ceramic notch filter, center frequency 6.5MHz BPF ceramic filter, centre frequency 10.7MHz LC series circuit Capacitor Inductance Homemade low-pass filter, 3dB bandwidth 400MHz Homemade high-pass filter, 3dB bandwidth 500MHz Short-circuit calibration circuit Open-circuit calibration circuit 50 ohm load calibration circuit Straight-through 10dB attenuation circuit 3dB attenuation circuit Each set of functional circuits Item size: 100 * 100mm / 3.9 * 3.9in Item weight: 38g / 1.3ounce Package size: 159 * 152 * 52mm / 6.3 * 6.0 * 2.0in Package weight: 65g / 2.3ounce Package list: 1 * PCB Radio FrequencyTester Board 2 * 200mm Adapter Cable