Measurement Components and Accessories Anritsu's high directivity bridges and autotesters set the standard for reflection measurements. The Calibration and Verification kits contain all the precision components and tools required to calibrate your VNA and VNMS for 12-term error-corrected measurements in the connector style of your choice. The power dividers are 3-resistor symmetrical designs with excellent amplitude and phase tracking. The power splitters are 2-resistor designs, used to accurately split signals for ratio measurements. Also featured are broadband microwave limiters, which provide the widest frequency range available in a limiter.