The 81130A Pulse Generator Mainframe with one or two 81131A or 81132A output modules (not included), 400 / 660 MHz precision single/dual-channel pulse/pattern generator is currently the highest-frequency 81100-family mainframe. It offers at least factor 10 better delay and width accuracy than the 81110A's self-cal because the intervals are derived from the PLL oscillator. For this reason, no alternative triggerable oscillator is offered. Compared with the 81110A, the memory is larger (64 kbit), segmentable and has counted loop and sequenced prbs capability in order to give more flexibility for serial data requirements such as comms messages and inialization routines. Dual channels can be EXORed, the resulting four timing edges allow pulses with different delays and widths to be present in a single signal. Depending on the output module type, the pulse transitions are selectable 800 ps / 1.6 ns or fixed at 500 ps. They have source impedances of 50-ohm and supply up to 3.8 and 2.5 Vpp respectively, 50 ohm into 50-ohm. Delivery including 2 each 81132 A.