Users only need to have a general understanding of the specific technical indicators of the three-generation chips, and more importantly, compare and observe whether

　　Has the following characteristics.

　　(1) Fast positioning time: Regardless of cold start, warm start, and hot start, the recapture time is 5-30 seconds faster (compared with the second generation), in fact, most users are not worse than this ten seconds.

　　(2) High sensitivity: that is, it can quickly locate and receive more than 4 satellites in tall buildings, shades of trees, under bridges, shelters, tunnels, windows, inside cars, and even under the chassis of the car. It is often said: a little sky can be positioned (single star positioning), that is, "give a little sunshine and it will be brilliant".

　　(3) Anti-interference performance: high-voltage lines, electric fields, magnetic fields, high-speed dynamics, microwaves, mobile phones, and the same frequency interference environment can still work normally.

　　(4) Low power consumption and power saving: The power consumption is reduced, and there is even a sleep state (static not working), which can save power and improve the standby time of the product.

　　(5) Small size, good performance-price ratio: small size and light weight, which are the needs and development trends of the society, and can expand more application scope and fields. In fact, the price of the third-generation chip should be the same as the second-generation chip, or even lower, but the function is much improved, T-38 (16 channels, 3rd generation) 200-300 yuan / block.

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