An atmospheric data measurement system comprises an atmospheric sensor, personal digital assistant, link, power system, and enclosure. A sample of bulk material is consolidated under controlled pressure in a sample cup with a hole or holes in the bottom. The phase-current allowable-value setting device is configured to set a phase current allowable value based on the draw current allowable value and an ON time of a switching element in a power converter. In addition, a nozzle mounting surface of the die body provides a universal interface to the various types of nozzles. The semiconductor light-receiving device, which monitors light emitted from the semiconductor light-emitting device, is mounted on the top layer of the second ceramic substrate. In the present invention, in order to expand the coverage of the control channel to at least the coverage of the data channel, the time resource of the transmission resource wherein the control channel is transmitted is expanded and allocated for sending and receiving the control channel.