PULSE is a directed Transient ElectroMagnetic Pulse weapon (or TEMP). It is the newest idea in electromagnetic weaponry. Most EMP devices are built around the principle of "known vulnerabilities." You want to disable that radio station? Well, that antenna receives as well as it transmits. So you dump large amounts of microwave energy at the proper frequency against it, in a highly directed microwave beam. This is known as the HERF, or High Energy Radio Frequency, method. In essence, the station is flooded with the microwave's energy until the specifically targeted circuits burn out.
The TEMP weapons are different. They rely on a "shotgun" approach. Instead of hitting a single frequency with lots of power over a long period of time, the TEMP method hits every frequency with lots of power over an extremely short period of time. A TEMP is more like a lightning strike (without the fancy bolts) than a microwave beam. PULSE is a TEMP, which will, if built according to plans, output over 2.4 Gigawatts/meter^2 at the mouth of the antenna. This is its page, and its story.