With the electromagnetic Log compared with high accuracy, to measure absolute speed, range, to measure the ship horizontal speed advantages.
它与电磁计程仪比较具有测量精度高；能够测量绝对航速、航程；能够测量船舶横向移动速度等优点。
The properties of domestic high-frequency broadband sweeper, for instance, the dynamic range, logarithmic accuracy, flatness and log linear, still need to be improved.
目前国产高频宽带扫频仪的对数放大器性能还有待提高。
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