Measuring instrument and method for measuring a signal with several partial signals

摘要

Measuring instrument for measuring a signal (1, 101) having a first partial signal (2, 3, 4, 5, 6, 7, 8) and at least a second partial signal (2, 3, 4, 5, 6, 7, 8), having a high frequency processing device (25),wherein the high frequency processing device (25) is designed to mix the signal (1, 101) to an intermediate frequency signal (103) and digitize this to a digital total signal (104),characterized by this,that the measuring instrument has a digital mixer (18) to generate a first digital total measurement signal (107a) and a second digital total measurement signal (107b) by shifting the frequency of the total digital signal (104),that the measuring instrument has a common digital filter (19) to successively filter the first total digital measurement signal (107a) to a first digital measurement signal (108a), and to filter and the second total digital measurement signal (107b) to a second digital measurement signal (108b); andthat the first digital total measurement signal (107a) and the second digital total measurement signal (107b) have different center frequencies.