These three models are the first in the Spectrum Master family to feature a quasi-peak detector and CISPR bandwidths for EMC pre-compliance testing. RBW range of these units is 1 Hz to 3 MHz, as well. Additionally, the MS2721B can be equipped with a tracking generator that provides calibrated output from 400 kHz to 7.1 GHz with a power range of 0 to -40 dBm in 0.1 dB steps.

The Spectrum Master designs inherent performance advantages are also realized with the MS2724B, MS2723B, and MS2721B. The MS2721B has best-in-class typical DANL of -163 dBm at 1 GHz in a 1 Hz bandwidth while the MS2723B and MS2724B deliver a DANL of -156 dBm at 1 GHz (1 Hz RBW) with preamplifier on and -139 dBm with the preamplifier off. These instruments have the fastest sweep speeds of any spectrum analyzer in their respective classes. To simplify measurements and ensure accuracy, they also have several smart measurements, including channel power ratio, Carrier to Interference ratio (C/I), and field strength.