A test instrument having a broadband receiver with amplitude/phase normalization including an input port, intermediate (IF) frequency stages and a digital signal processor in series comprising:
- normalization sources having an output;
- a relay having a first input coupled to the input port, a second input coupled to the output of the normalization sources and an output coupled to the input of the intermediate frequency stages such that when the relay is in a first position the first input is coupled to the output and when the relay is in a second position the second input is coupled to the output;
- and
- means in the digital signal processor for generating a table of gain versus frequency when a calibrated test signal is applied to the input port and the relay is in the first position and for generating compensation data from the normalization sources when the relay is in the second position.