Static Field
The caster can set up an invisible static field with his magical energy. This field, which blankets his area of effect, disrupts television, radio, CB, walkie-talkie, and other broadcasting devices. It also disrupts all closed-circuited monitoring security systems and scanners, most computer systems, robotic "brains", and any other highly sophisticated electronic devices. The field moves with the caster and once an item is outside the field, it works as before.
Any attack that uses broadcast power, such as a m.a.s.e.r. (microwave), must punch through the field first. Treat the spell rank as body armor for purposes of defense.