I have received several questions about the TinySA. So, just a little history and overview of the hardware of the TinySA before I get into the settings and actual use.
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After I joined Home Brew Test Equipment in Groups.io, I became interested in a series of posts by Erik Kaashoek detailing a SpectrumAnayzer he was building using mostly small modules that are available on E-Bay.
These are basically a complete SDR transceiver in an about 1 cm. square IC, and cover a frequency range of 240 to 960 Mhz. They are designed for digital data transmission in applications such as remote time pressure monitors, therefore very inexpensive. There are several different modules, with support circuitry available for well under $5. The other thing that simplifies the design, is using a 433 MHz. 1st. IF, where Erik could use readily available 433 MHz SAW filters to obtain required selectivity. I had attempted to copy portions of the design, but without much experience or equipment suitable for use above the HF range, I ran into several problems. I decided to just wait and see what others finally came up with. And, I am really glad that I did. When I saw the unit was prduced by Hugen, I jumped at the first production run. Hugen has done a fantastic job with his several versions of the NanoVNA, and I am very satisfied with the units I have from him.