Prior to each measurement, I calibrated both VNA's for the specific frequency range to be tested. The FieldFox at my work QTH also has an upper frequency limit of 4 GHz and was perfect for comparing the S21 performance of the nanoVNA. Like most hams, I don't need to measure anything at 4 GHz but I do want the increased accuracy (hopefully!) that comes from increased dynamic range. It is primarily due to the increased dynamic range that I bought this VNA. 20dB more dynamic range than earlier nanoVNA's.Beefier controls for slewing the cursor and markers.A charge status indicator for the battery & charging from a computer's USB jack.An internal 18650 Li-Ion battery (not included due to shipping restrictions).The nanoVNA 2 Plus4 differs from the previous versions in several ways. Today I finally had the opportunity to put the diminutive piece of test equipment on the bench to get a real idea of its performance. But their performance has been incredibly accurate, so I ordered and had high expectations of the new VNA. It was around $170 and I would not have spent that if the prior nanoVNA's hadn't given me the confidence to do so. After a three week transit, my nanoVNA 2 Plus4 arrived in my mailbox.
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