The battery-output channels of the Models 2302 and 2306 are designed to simulate the output response of a battery. This capability, combined with their fast transient response, makes it possible to power the device during testing in exactly the same way as a battery will power the device during actual use. The output resistance of the Model 2302s and the Model 2306s battery channel can be programmed (with 10mO resolution) over the range from 0O to 1O so that the output resistance can be set to the same level as the output resistance of the battery that powers the device.
Portable wireless devices make great demands on their battery power sources. The battery must source load currents that can jump virtually instantaneously from a standby current level (100-300mA) to a full-power RF transmission current level (13A). In other words, the load current on the battery can increase rapidly by a factor of 7001000%. As a result, the battery voltage drops by an amount equal to the value of the current change multiplied by the batterys internal resistance. The Models 2302 and 2306 power supplies enable test systems to duplicate this voltage drop by programming their output resistance to be equivalent to that of the battery that will power the device. This allows wireless device manufacturers to test their products under the same power conditions that they will encounter in actual use.