{"id":2272,"date":"2010-07-01T00:00:54","date_gmt":"2010-06-30T15:00:54","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2272"},"modified":"2023-03-20T17:27:32","modified_gmt":"2023-03-20T08:27:32","slug":"zyouhou","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/zyouhou.html","title":{"rendered":"Noise immunity evaluation of information and communication equipment"},"content":{"rendered":"

The correlation between noise level and transmission speed are verified.<\/p>\n\n\n

Application<\/h2>\n

In this paper, the evaluation of a mobile phone module is mentioned as an example. <\/p>\n

This system intends to evaluate how the EUT (mobile phone module) put in anechoic box is affected after the signal output from signal generator (SG) is radiated in it. This system has the frequency range from 800MHz to 2.5GHz and is a tool for detecting the EMC problem in the early stage of design or measuring a communication effective throughput by the program of EUT or control equipment.<\/p>\n\n\n\n

Solution<\/h2>\n

System configuration example<\/h3>\n
\n
    \n
  1. Transmission section (1)(2)<\/li>\n
  2. Evaluation stage<\/li>\n
  3. Measurement & display section<\/li>\n<\/ol>\n<\/div>\n\"Figure:System\n\n

    System specification example<\/h2>\n\n
      \n
    1. Transmission section *Insert an isolator if necessary.\n

      The signal to be applied to EUT is generated. The power is roughly +30 dBm but depending on the measurement band. Transmission section (1) and (2) are installed in one case.<\/p>\n\n\n\n\n\n\n\n\n
      Signal generator<\/td>\nFrequency range<\/td>\n9kHz to 3GHz(CW)<\/td>\n<\/tr>\n
      Output level<\/td>\n-127 to \uff0b13dBm<\/td>\n<\/tr>\n
      Power amplifier<\/td>\nFrequency range<\/td>\n800MHz to 2.5GHz<\/td>\n<\/tr>\n
      Output power<\/td>\n5W\u4ee5\u4e0a<\/td>\n<\/tr>\n
      LPF*<\/td>\nCutoff frequency is 1GHz at the measurement from 800MHz to 1GHz, and 2GHz at the measurement from 1.5GHz to 2GHz.<\/td>\n<\/tr>\n
      HPF*<\/td>\nCutoff frequency is 1.6GHz at the measurement from 800MHz to 1GHz, and 3GHz at the measurement from 1.5GHz to 2GHz.<\/td>\n<\/tr>\n
      DC block<\/td>\nParts for cutting DC<\/td>\n<\/tr>\n<\/tbody><\/table>\n

      <\/p>\n<\/li>\n

    2. Evaluation stage\n

      The signal generated at \u2460 is radiated in anechoic box through an antenna coupler. <\/p>\n\n\n\n\n\n\n\n\n\n
      Anechoic box<\/td>\nShielding effectiveness<\/td>\n800MHz to 3GHz(more than 50dB)<\/td>\n<\/tr>\n
      Outside dimensions<\/td>\napprox. 260(W) x 260(H) x 360(D)mm<\/td>\n<\/tr>\n
      Inside dimensions<\/td>\napprox. 200(W) x 100(H) x 300(D)mm<\/td>\n<\/tr>\n
      Table for put EUT<\/td>\n200(W) x 280(D)mm<\/td>\n<\/tr>\n
      I\/F<\/td>\nSMA connector *2pcs<\/td>\n<\/tr>\n
      Antenna coupler<\/td>\nFrequency range<\/td>\n800MHz to 2.5GHz<\/td>\n<\/tr>\n
      VSWR<\/td>\n2.5\u4ee5\u4e0b(800MHz to 2.2GHz)<\/td>\n<\/tr>\n
      Maximum output level<\/td>\n\uff0b38dBm<\/td>\n<\/tr>\n<\/tbody><\/table>\n

      <\/p>\n<\/li>\n

    3. Measurement & display section\n

      The report will be drawn up after measured in the circumstance of \u2461.<\/p>\n\n\n\n\n
      Spectrum Analyzer<\/td>\nFrequency range<\/td>\n50kHz to 8.5GHz<\/td>\n<\/tr>\n
      PC software<\/td>\nThe result obtained by spectrum analyzer is displayed and the report is drawn up. <\/td>\n<\/tr>\n
      PC<\/td>\nThe communication status such as the effective throughput is made sure using the program of control equipment and EUT.<\/td>\n<\/tr>\n<\/tbody><\/table>\n

      <\/p>\n<\/li>\n<\/ol>\n\n\n\n

      Products introduction<\/h2>\n