Abstract: This application provides a wireless data terminal and a wireless data terminal control system. The wireless data terminal includes a housing, a drive assembly, a first antenna assembly, and a second antenna assembly. The drive assembly can drive the first antenna assembly and the second antenna assembly to extend or retract to move in different directions between a first location and a second location. When the wireless data terminal does not need to be used or high isolation between antennas is not required, the drive assembly may drive the antenna assembly to retract to the first location, so that a volume occupied by the wireless data terminal can be reduced while an antenna isolation requirement is met. When high isolation between the antennas is required, the drive assembly may drive the antenna assembly to extend to the second location, so that isolation between the antennas is increased.

Abstract: This application provides a wireless data terminal and a wireless data terminal control system. The wireless data terminal includes a housing, a drive assembly, a first antenna assembly, and a second antenna assembly. The drive assembly can drive the first antenna assembly and the second antenna assembly to extend or retract to move in different directions between a first location and a second location. When the wireless data terminal does not need to be used or high isolation between antennas is not required, the drive assembly may drive the antenna assembly to retract to the first location, so that a volume occupied by the wireless data terminal can be reduced while an antenna isolation requirement is met. When high isolation between the antennas is required, the drive assembly may drive the antenna assembly to extend to the second location, so that isolation between the antennas is increased.

Abstract: A method for implementing audio connector interface conversion is provided in an embodiment of the present invention. The method includes installing a 4-pin jack of an audio connector inside a terminal device, and connecting the power end, signal end, and grounding end of an infrared interface on the terminal service control unit and the serial signal transmitting end, serial signal receiving end, power end, and grounding end on the terminal service control unit directly or through a logical circuit unit to the four connecting ends on the jack of the audio connector. In the technical scheme provided in an embodiment of the present invention, control and switching can be performed on the basis of the working mode, so that the electronic terminal device with an audio interface can use its audio interface to provide an infrared signal interface and a serial communication port.

Abstract: A method for implementing audio connector interface conversion is provided in an embodiment of the present invention. The method includes installing a 4-pin jack of an audio connector inside a terminal device, and connecting the power end, signal end, and grounding end of an infrared interface on the terminal service control unit and the serial signal transmitting end, serial signal receiving end, power end, and grounding end on the terminal service control unit directly or through a logical circuit unit to the four connecting ends on the jack of the audio connector. In the technical scheme provided in an embodiment of the present invention, control and switching can be performed on the basis of the working mode, so that the electronic terminal device with an audio interface can use its audio interface to provide an infrared signal interface and a serial communication port.