This chapter contains information on all SCPI programming commands accepted and implemented by the ML2439A Power Meter. The majority of the GPIB commands have equivalents in the front panel menu settings. The ML2439A Power Meter supports the IEEE 488.2–1992 GPIB standard in ML2439A (native) mode (HP emulation commands are not GPIB 488.2 compliant). For further information about GPIB programming, refer to the IEEE 488.1/2 Standards documents.