The PG 509 Pulse Generator is a fast-risetime pulse source producing narrow rectangular pulses at a repetition rate of 50 KHz.The PG 509 can deliver a continuous pulse train at an amplitude of 25 volts into an output toad of 50 ohms. The PG 509 Pulse Generator is a TM 500 Series plug-in instrument. All functional electronics are included, but it requires insertion in a TM 500 or TM 5000 Series Power Module Mainframe for interfacing to basic power supplies. The PG 509 Pulse Generator was primarily designed to be an integral part of a test system. Figure 1-1 shows primary components and connections immediately related to the Pulse Generator in a typical system. Other than the System Controller, Device Under Test, and PG 509, these are: • A programmable attenuator (TEKTRONIX AT 5010, or equivalent); used to provide system selection for the degree of attenuation required. • A high frequency multiplexer/switcher (TEKTRONIX SI 5010, or equivalent); used to route inputs and outputs between Instruments and test devices while under system control. Note that while the PG 509 is not under direct GPIB control, it is typically directed by instruments that are. In a mostly Tektronix instrument configuration, this would typically mean that the PG509 be installed in a TM 5000 (programmable plug-in compatible) Power Module, as is required for the other two devices.