Q: What is passive intermodulation (PIM)? A: PIM is the generation of interfering signals caused by nonlinearities in the mechanical components of a wireless system. Two signals mix together (amplitude modulation) to produce sum and difference signals and products within the same band, causing interference.

Spurious interference Spurious interference refers to the additive interference generated by the interference source in the working frequency band of the interfered receiver. Spurious interference includes the out of band power leakage of the interference source, amplified background noise, and transmit inter-modulation product. Spurious interference can reduce the signal noise ratio (SNR) of the interfered receiver. Spurious interference is generated by a transmitter and usually includes the thermal noise generated and amplified by the power amplifier (PA). Inter-modulation products can be generated during the multi-carrier operation and spurious signals can also be generated by frequency mixer.

亲生经历罗马尼亚驾照换国内驾照（成都） 根据公安部公布的《机动车驾驶证申领和使用规定》第二十一条，持境外机动车驾驶证的人申请机动车驾驶证，应当填写《机动车驾驶证申请表》，并提交以下证明、凭证： （一）申请人的身份证明；我是重庆户口，除开身份证还需要暂住证。 （二）县级以上医疗机构出具的有关身体条件的证明； （三）所持机动车驾驶证。属于非中文表述的，还应当出具中文翻译文本（须有正规注册的第三方翻译机构翻译）。