The present invention discloses a method for manufacturing a TFT LCD array substrate by utilizing the gray tone mask technology and the photoresist lifting-off technology with only two masks in two photolithography processes, and to a TFT LCD array substrate manufactured by the same. The present invention aims to limit antenna calibration duration in the antenna calibration chain. A secondary piston slidable and pressure-tight piston is fitted in the channel and loaded by an elastic bias. Further, a knock reference value KCK is set by adding a predetermined value K to the vibration intensity reference value VIB.