Abstract: A user interface is presented for a tester that tests a frequency converter having an input port, an output port and a local oscillator port. In a first area, a user can specify frequency for an input signal to be placed on the input port. In a second area, the user can specify frequency for a local oscillator signal to be placed on the local oscillator port. The tester calculates expected frequency values of an output signal on the output port output based on values entered in the first area and the second area.

Abstract: A user interface is presented for a tester that tests a frequency converter having an input port, an output port and at least one local oscillator port. An indication as to signals for which the user interface is to calculate signal frequencies is accepted from a user. Also accepted from the user are values for signal frequencies for signals for which the user interface is not to calculate signal frequencies. Values of signal frequencies for signals for which the user interface is to calculate signal frequencies are then calculated based on values accepted from the user for signals for which the user interface is not to calculate signal frequencies.