Concept of Local Signal Generator and Automatic Gain Control Procedure in Broadband Radio Receiver

On the market, many broadband radiocommunication devices are offered by various companies. However, devices that can operate at the 1÷6 GHz carrier frequencies (i.e., sub-6GHz band) and record radio signals with the 500 MHz bandwidth continuously are not available off the shelf. These and other requirements had to be considered during developing and implementing a broadband radiocommunication recorder using commercially off-the-shelf (COTS) components available on the market. One of its elements is a broadband receiver that requires the implementation of appropriate calibration mechanisms. This paper presents the concept of a local signal generator as a primary calibration element for the receiver in the broadband recorder.