A method and circuit for accurately measuring radio frequency power level in a pulsed RF transmission. When a \u201cshort\u201d packet arrives, it is tagged and a table is searched based upon the packet’s information. Additionally, the PCB modules include a front panel configured with screws for securing the PCB modules to the chassis of the IMA cabinet. A carrier freguency loon detects a carrier freguency of the received analog input signal. The power conversion unit is used commonly in both the first and second power transferring means and used for transferring the power between the battery and the first power supply section and for transferring the power between the battery and the second power supply section.