In order to prohibit students from using mobile phones, a private middle school in Zhengding County installed several Cell Phone Blocker Installed In Car on the roof of the school's teaching buildings. This time the students can no longer use their mobile phones, but because the equipment is located on the roof and the surrounding area is very empty, the surrounding residents are also severely disturbed when using mobile phones. On March 25, the Shijiazhuang Radio Administration Bureau of Hebei Province ordered the school to remove the roof instruments in accordance with relevant regulations. However, the school said that the use of mobile phones has a great negative effect on the normal learning of students, and how to effectively supervise it has become a difficult problem. According to an operator in Zhengding, for a long time, the company has frequently received reports from residents in the northeastern area of Zhengding County that the mobile phone often appears intermittent when making calls. The company sent personnel to check the signal base station many times and found that there was no problem. For this reason, it sought help from the Shijiazhuang Radio Administration to investigate the source of radio signal interference in the area. On March 25, Shijiazhuang Radio Administration sent law enforcement officers and radio monitoring vehicles to the northeast of Zhengding County for testing. After investigation, the staff initially detected that a private middle school in the northeastern area of the county had the strongest signal interference. It was initially determined to be the impact of the cell phone jammer device. When talking with residents around the school, the staff confirmed that the situation of mobile phones in this area is indeed serious, but the residents do not know what the reason is.
The radio direction-finding and positioning instrument detected that Cell Phone Blocker Installed In Car was on the campus of this private middle school. After entering the campus, the staff found that all the buildings of the school were bungalows, and a yellow box-like device was installed on the roof of many of the teaching rooms. Professional instrument tests show that the device emits radiation with strong frequencies, and the mobile phone signals carried by the staff have completely disappeared. The school admitted that the device was a "mobile phone jammer", and the cell phone signal jammer was turned on because the third grader was taking a mock exam that day. It is reported that the transmission frequency of this instrument has multiple frequency bands such as 800 MHz and 1800 MHz, and these frequency bands include the frequency bands used by communication operators. According to the school leaders, students use mobile phones to affect their learning. In order to achieve the purpose of prohibiting the use of mobile phones, the school has invested heavily in the purchase and installation of "mobile phone signal jammers", which are installed on the roof. "I didn't expect that it would have an impact on the lives of the surrounding residents," the person in charge said. The package of the instrument is clearly marked, and the effective range is 30-50 meters. "How can the impact range be so large?" The work of the Radio Administration According to the personnel, since the installation site is located on the roof and there are no buildings around it, when the mobile phone signal jammer is turned on, the interference range will expand. According to reports, the use of mobile phone signal jammer devices has stricter regulations, and can only be used in occasions such as major national exams and high-level meetings. This private middle school also uses this kind of equipment in daily teaching, which has an impact on the normal life of the surrounding residents. The Shijiazhuang Radio Administration ordered it to remove the mobile phone signal jammer according to law.
