A hardware device or server software that captures packets transmitted in a network for routine inspection and problem detection. Also called a "sniffer," "packet sniffer," "packet analyzer ...

Network Analyzers are frequently used for measuring filters, making them extremely valuable for building radios and general mucking about with RF. They are, however, extremely expensive.

RF components such as connectors, cables, antennas, and PCB traces need characterizing so you know how they will perform.

Signal Hound – manufacturer of accessible, versatile, precision test equipment – announced the release of the highly anticipated VNA400 to its expanding product line.