Agilent recently announced an LTE test solution that combines its 89600 VSA LTE FDD and LTE TDD analysis software with the highest-performance member of the Agilent X-series, the N9030A PXA signal analyser.
The PXA’s bandwidth allows multicarrier signal analysis as well as analysis and troubleshooting of the digital predistortion (DPD) techniques applied to power amplifiers used in advanced wireless technologies such as LTE. Using the PXA’s simultaneous 140 MHz wide bandwidth with up to 75 dB of spurious-free dynamic range, users can capture higher-order intermodulation products up to seventh order for 20 MHz LTE systems for characterisation of power amplifiers using DPD techniques. Powerful, real-time corrections offer accurate, low-distortion measurements that allow vector measurements with very low residual error vector magnitude (EVM).
The combination of the PXA, the 89600 VSA LTE FDD and LTE TDD analysis software enables the user to analyse all of the LTE bandwidths and all of the uplink and downlink channels and signals. It also provides the ability to make channel-selective measurements to troubleshoot by resource block, sub-carrier, slot or symbol. The VSA software has a well designed user interface, including up to six simultaneous, user-selected displays, colour coding and marker coupling among multiple traces. Using the software, users can make RF transmitter measurements on a base station as well as on user equipment using a single option.
In addition to its excellent LTE performance, the PXA’s specifications include
-128 dBc/Hz phase noise at 10 kHz offset (1 GHz), 0,19 dB absolute amplitude accuracy and -172 dBm displayed average noise level (DANL) at 2 GHz (with preamplifier and noise floor extension technology). The noise floor extension technology reduces the effective noise level of the signal analyser, improving its dynamic range. This allows the PXA to achieve excellent ACLR dynamic range for complex LTE signals.
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