I. Introduction
The RFSU plays a vital role in the communication systems of military, aerospace, and defence. The RFSU module synchronizes the Radio Frequency signals and transmits from the sending end to the receiving end. RFSU consists of three parts, they are calibration card, command & control unit, and Radiofrequency channel card. Generally, Radio waves are transmitted through an antenna then the Calibration card measures the receiver bandpass Radio Frequency signals and calibrates according to source data. Now, Command & control unit controls deviation in frequency signals with respect to exact values and maintains accuracy levels and it also maintains accuracy levels and sends to the radiofrequency channel card. It also maintains a balance in power consumption and environmental conditions. The Radio Frequency channel card is an important part of RFSU and can transmit signals to the receiving end with wireless communication. The RFSU module using in Military, Defence & Aerospace, and Industries. The RFSU module usually transmits and receives Radio Frequency Signals and also used for communication especially in Warzones. If it is failed, communication does not send from one end to another end, then it maybe one of the failure criteria in the armed force. So, in this scenario, RFSU module reliability analysis is more essential.