Since I just got it yesterday, I'm still in the learning curve. I'm working on doing a second Calibration to save in memory 1 so I can have a more compressed range. That 50 Khz to 900 Mhz thing won't let me read my 160 meter dipole. I want to save a range between 1 Mhz to 30 Mhz. Then I can RECALL whichever scale I need for HF by pulling up memory 0 or memory 1. So far, everything that I checked had a tendency to show up as being resonant on the low end of each band. Using the scale that goes from 50Khz to 900 Mhz, I had a about 20 resonant frequencies on my 160 meter dipole. One of them was right on the CB 27 Mhz range. I wondered why I could hear the CB'ers so well on that monster dipole. I've got two reels of large coax that I'm not certain of the impedance. Once I figure out how to read Impedance, I'll check those out. I hope they turn out to be 52 Ohms because they are all double shielded. I bought 3 reels for a total of $50. One of the reels is definitely 75 Ohms.