The FSL is an extremely lightweight and compact spectrum analyzer for cost-conscious users who want the functionality of high-end instruments. The analyzer is ideal for a large number of applications in development, service and production.<br><br>Despite its compact size, it offers a wealth of functions more typical of the high-end range, thus ensuring an excellent price/performance ratio. The FSL is the only instrument in its class that features a tracking generator up to 18GHz and can analyze signals with a bandwidth of 28MHz. In addition, the FSL18, which operates at frequencies up to 18 GHz, supports applications in the microwave range.