@article{oai:jaxa.repo.nii.ac.jp:00033048,
 author = {国谷, 紀夫 and 櫻井, 久紀 and 松坂, 幸彦 and 山上, 隆正 and 太田, 茂雄 and 矢島, 信之 and KUNIYA, Norio and SAKURAI, Hisanori and MASTUZAKA, Yukihiko and YAMAGAMI, Takamasa and OHTA, Shigeo and YAJIMA, Nobuyuki},
 journal = {宇宙科学研究所報告. 特集: 大気球研究報告},
 month = {Dec},
 note = {A crystal-controlled transmitter has been developed for a telemetry system of a scientific balloon experiment. The transmitter is designed to send 16kHz PCM data or black and white TV camera signals by FM modulation. A carrier frequency of the transmitter is controlled by a PLL circuit and can be adjusted from 1670MHz to 1690MHz. The nominal out-put power is 0.5W and it can be easily increased to 5W by adopting a power booster amplifier. In order to eliminate EMI noise effect, the main unit of the transmitter is contained in a small aluminum case. It also serves as an effectve heat sink. The antenna unit is attached to a frame of a gondola and connected to the main unit through a coaxial cable. The transmitter was applied to 15 balloon flights and all worked well. The frequency drift was smaller than 16kHz nominal under the temperature condition in a stratosphere. The transmitter is expected to become one of the standare instrument for scientific balloon experiments., 資料番号: SA0166902000},
 pages = {21--31},
 title = {大気球搭載用水晶制御 FM 送信機},
 volume = {24},
 year = {1989}
}