Anritsu have introduced two new microwave USB power sensors that provide accurate average power measurements from 10MHz to 18GHz over 60dB of dynamic range. Employing a ’dual path’ architecture to achieve true-RMS measurement similar to a thermal sensor over the entire frequency and dynamic range, the power sensors can measure CW, multi-tone, and digitally modulated signals used in commercial and aerospace/defence systems.
The MA24108A and MA24118A sensors can either internally trigger or receive an external trigger signal, allowing them to conduct multi-slot and burst average power measurements of TDD waveforms, typically found in GSM, WiMAX, and TD-SCDMA signals. The MA241X8A series do not require a separate module for triggering. These sensors have built-in external trigger circuitry with an MCX connector interface to receive triggers from external stimuli. Incorporating a micro-controller, signal conditioning circuitry, ADC, and power supply in the sensor makes it a miniature power meter.
The sensors provide users with three modes of operation –Continuous Average, Scope, and Time Slot. A Scope mode allows power measurements to be displayed with respect to capture time of up to 300ms. It is useful when measuring non-periodic waveforms with video bandwidth up to 50kHz. The time gating feature in the Scope mode enables measurement of the desired portion of a waveform that contains short duty cycle timing information that otherwise skews average power measurement.
All three modes can be accessed through PowerXpert or through remote programming commands. PowerXpert is a Windows-based data analysis and control software developed by Anritsu. It has abundant features, such as data logging, power versus time graphs, and a big numerical display, that enable quick and accurate measurements.