A 30Gbit/s receptor module is developed with a CMOS integrated receiver chip（IC） and a GaAs-based 1 × 12 photo detector array of PIN-type. Parallel technology is adopted in this module to realize a high-speed r...A 30Gbit/s receptor module is developed with a CMOS integrated receiver chip（IC） and a GaAs-based 1 × 12 photo detector array of PIN-type. Parallel technology is adopted in this module to realize a high-speed receiver module with medium speed devices. A high-speed printed circuit board（PCB） is designed and produced. The IC chip and the PD array are packaged on the PCB by chip-on-board technology. Flip chip alignment is used for the PD array accurately assembled on the module so that a plug-type optical port is built. Test results show that the module can receive parallel signals at 30Gbit/s. The sensitivity of the module is - 13.6dBm for 10^-13 BER.展开更多
分析GE Optima CT660的3例故障,分别为机架旋转时出现噪声、球管曝光时提示报错信息“(40-0114)Rotor not at speed”和图像有严重的伪影。理论结合实践,采用逐步排除法、仔细观察法、故障分析法和维修手册查阅法,通过调整皮带驱动轮的...分析GE Optima CT660的3例故障,分别为机架旋转时出现噪声、球管曝光时提示报错信息“(40-0114)Rotor not at speed”和图像有严重的伪影。理论结合实践,采用逐步排除法、仔细观察法、故障分析法和维修手册查阅法,通过调整皮带驱动轮的轴向位置并拧紧顶丝、更换同型号球管后进行参数调试和动平衡校准、更换32号探测器模块等措施解决故障。该案例不仅为同行提供参考,对于提高维修效率,保障设备安全运行,提高临床工程师技术水平,降低医院维保费用等工作也有重要作用。展开更多
文摘A 30Gbit/s receptor module is developed with a CMOS integrated receiver chip（IC） and a GaAs-based 1 × 12 photo detector array of PIN-type. Parallel technology is adopted in this module to realize a high-speed receiver module with medium speed devices. A high-speed printed circuit board（PCB） is designed and produced. The IC chip and the PD array are packaged on the PCB by chip-on-board technology. Flip chip alignment is used for the PD array accurately assembled on the module so that a plug-type optical port is built. Test results show that the module can receive parallel signals at 30Gbit/s. The sensitivity of the module is - 13.6dBm for 10^-13 BER.
文摘分析GE Optima CT660的3例故障,分别为机架旋转时出现噪声、球管曝光时提示报错信息“(40-0114)Rotor not at speed”和图像有严重的伪影。理论结合实践,采用逐步排除法、仔细观察法、故障分析法和维修手册查阅法,通过调整皮带驱动轮的轴向位置并拧紧顶丝、更换同型号球管后进行参数调试和动平衡校准、更换32号探测器模块等措施解决故障。该案例不仅为同行提供参考,对于提高维修效率,保障设备安全运行,提高临床工程师技术水平,降低医院维保费用等工作也有重要作用。
