Made of fine quality material, practical, has a long service life. Compact and , easy to operate and use. This is a vector network analyzer learner tool. Can be used with -F to measure 6.5M ceramic filter. Can be used with -F to measure homemade low-pass-filter, 3dB bandwidth about 400MHz. 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 filter, center frequency 6.5MHz BPF ceramic filter, centre frequency 10.7MHz RC series circuit 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 Colour:green Material:PCB Size: 100 x 100MM Package Contents: 1 x test board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.