论文部分内容阅读
JDW808A型手持式无线电话机是上海航测仪器厂最新研制推出的产品。该机是一部列车长专用电台。除了151MH_Z专用工作频率外,还可在1MH_Z范围内增加二个载波频率,组成三个频道。音频呼叫频率为1792和2400H_Z。本机较同类产品性能好、体积小、重量轻、造型美观、使用方便,可供列车长随身携带,在运行的列车上分别呼叫车站或机车,进行通信联络。是列车安全运行而必备的现代化通信装置。上海航测仪器厂已有近四十年的历史,技术力量雄厚,拥有相当数量较先进的金切设备和电子测量仪器,在产品开发和产品质量保证方面,享有一定的声誉。
JDW808A hand-held radio telephone is the latest development of Shanghai Aerospace Instrument Factory launched products. This machine is a train station dedicated radio. In addition to 151MH_Z dedicated operating frequency, but also in the 1MH_Z increase two carrier frequencies, composed of three channels. Audio calling frequency is 1792 and 2400H_Z. The machine is better than similar products, small size, light weight, beautiful appearance, easy to use, for the conductor to carry, call the station or locomotive on the running train, communication and contact. It is an essential modern communication device for safe operation of trains. Shanghai Aerospace Instrument Factory has nearly 40 years of history, strong technical force, with a considerable number of more advanced metal cutting equipment and electronic measuring instruments, product development and product quality assurance, enjoy a certain reputation.