DC to 26.5 GHz signal switching Up to 50 channels Matrix, multiplexer, and general purpose relays 40 configuration storage registers Digital I/O control and actuation 11 switch and control modulesVersatile GPIB (HP-IB) programmable switching for tests that require multi-channel measurements. Also offers a flexible, low-cost interconnection for automating experiments on the bench and for developing tests in the lab. The 3488A is designed to hold up to five switch and control modules for DC to 26.5 GHz signal switching and up to 50 channels.