Built-in calibration signal generator - When used without an analyzer, it can act as a two-output signal generator: MF/HF/VHF sine output from 0.1 MHz to 350 MHz and UHF square-wave output from 240 MHz to 960 MHz. Used for automatic self-test and calibration at low input levels. Input frequency ranges - Two inputs: a high-quality MF/HF/VHF input 0.1–350 MHz and a UHF input 240–960 MHz with a lower quality. PC control and connectivity - Can be connected to a PC via USB and implements the Serial-over-USB protocol (CDC), enabling a large command set. After connecting to a PC, the driver is automatically downloaded. ESD protection - Version 3.1 adds a new ESD protection function with installed diodes, delivering more sensitive response, efficient anti-static protection, higher quality, and longer life. Use scenarios - Standalone calibration: use the built-in generator to perform automatic self-test and calibration when an analyzer is not available. - RF test bench: generate controlled sine and square-wave signals to test RF paths, filters, and timing circuits across 0.1–350 MHz and 240–960 MHz. - PC-based automation: integrate into a workstation or test setup for automated RF calibration or signal generation through USB using CDC commands.