Siglent

Siglent produces bench test instruments across oscilloscopes, spectrum analyzers, vector network analyzers, signal generators and calibration kits, positioned as a lower-cost alternative to the established names.

The line has matured considerably and now covers specifications that were once premium only, which makes it a common choice for teaching laboratories, service departments and second-bench use. For the RF products in particular, confirm the connector interface and whether the matching calibration kit is included, since a vector network analyzer without a proper calibration kit measures your cables rather than your device.