Compatible with any spectrum analyzer, the IsoLOG 3D Mobile PRO from Aaronia is the perfect antenna for 3D measurements on the go. Depending on the model, it offers a frequency range from 9kH up to 8 GHz. Two integrated preamplifiers can be switched in lossless if required. Each of the three axes is equipped with two antennas, LOOP AND DIPOL. The individual axes can be fixed or switched through with a frequency of 1Hz - 50 kHz using the integrated "chopper" function, the frequency is controlled by a rotary potentiometer. This makes it a powerful mobile 3D antenna. The integrated rechargeable battery of the IsoLOG 3D Mobile PRO provides up to six hours of operating time.  https://aaronia.de/antenne/isolog-3d-mobile/