HP 5989-0565EN free download

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Current Drain Analysis Enhances WLAN Network Card Design and Test Application Note 1468 The trend is clear. Wireless Local Area Networks (WLANs) are quickly supplanting conven- tional LAN connections. Newer WLAN standards with improved interoperability and greater data rates are rapidly being developed and deployed. Critical to the success of new laptop WLAN network cards is minimizing their current drain. Their high power demand can reduce the battery operating time of their host laptop or notebook PC as much as 50%. Considerable effort is being made on reducing power consumption of WLAN network cards, from further integration at the silicon level to enhanced power management at the Medium Access Control (MAC) layer. These efforts all measurements, analyzing the start with having effective means dynamics of the current drain for measuring and evaluating signal provides valuable insight the current drain of designs in to the WLAN card's behavior their various operating modes and on optimizing its operation. and assessing the impact of Accurately making these DC subsequent design improve- and dynamic current measure- ments. Going beyond basic ments can turn out to be quite challenging in practice. Agilent Technologies Agilent DC sources and application software simplify measurement and analysis of current drain consumption on WLAN network cards The Agilent 66319B and Key Operating States and Modes There are various power 66321B DC Sources have for Current Drain Measurements savings settings that can be specialized capabilities suited WLAN network cards typically selected, such as: for powering and measuring feature multiple operating 1.Power savings-off (always the current drain on WLAN states to enhance their perfor- active mode) setting network cards during test, mance as a networked device, 2.Normal power savings-on whether for R&D, design while still minimizing power (doze mode) setting verification, or manufacturing. consumption. The Agilent 14565B Device 3.Maximum power savings-on (deeper doze mode) setting Characterization Software As a minimum the operating captures, analyzes, and states include: The power savings-off setting visualizes dynamic current