Every product claims to be better than the other.
This article will help Cable Operators select an F.S.M best suited to their requirements. It also throws some light on the calibration as well as the accuracy of Signal Level Measurement. These variety of meters mostly display the level of any one selected channel. It has either a manual or automatic attenuator and is mainly used by the line technician to check the continuity of the signal to the subscriber end. Ideally, these products should have a measurement range of 48 to 860 MHz.