The Racal 3271 VXI signal generator packs high-performance signal synthesis and modulation capability into a C-size, dual-slot VXI bus instrument. The 3271 signal generator, with its wide bandwidth and high level range capability, is ideal for many general-purpose RF laboratory or production test applications required by a wide range of modern digital and analog test systems. The 3271 also provides a compact alternative to GPIB instruments especially where large numbers of signal sources are required such as in the testing of Frequency Division Multiplexing (FDM) links. Sophisticated features such as mixed mode modulation and swept carrier mode are available. Features which provide enhanced operation include non-volatile memories, extensive modulation capability, reverse power protection, internal two tone source, memory sequencing and VXIbus triggering for test sequencing.