Build programmatic control of the bench - RF switch matrices, programmable attenuators, and signal routing so a test selects its own path without recabling; automated path-loss sweeps and per-path calibration files applied across frequency; thermal chambers, OTA positioners, programmable supplies, and electronic loads driven from the test sequence; and DUT provisioning including firmware flashing, modem and SIM configuration, and diagnostic, AT-command, and CAN control. Expert use of VNAs (SOLT/TRL/ECal calibration, de-embedding versus port extension), spectrum and signal analyzers (RBW/VBW and detector selection, SEM/OBW/ACLR, EVM, phase noise), oscilloscopes (high-bandwidth probing, power-rail transients, eye diagrams and jitter on DDR, automotive Ethernet, and USB), and power meters (average versus peak sensors, TDD burst measurement, path-loss compensation).