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Home > Advantest > U3841/3851/3872 Cross Domain Analyzers

Advantest U3841/3851/3872 Cross Domain Analyzers

Advantest U3741 Spectrum Analyzer World’s first vector signal analysis realized by two-channel phase synchronization!

The increasing density of components mounted on the boards of portable devices such as smartphones has given rise to complex inter-circuit interference issues. Meanwhile, inverters used for motor control in automobiles or to prevent flickering in LED lighting applications can also generate unwanted noise. For efficient identification of the source of electronic interference, the ability to simultaneously measure and compare multiple noise signals is highly valuable. Advantest's new U3800 cross domain analyzer meets this demand with its two-channel simultaneous phase measurement function, an industry first in a single measuring instrument.

The U3800 builds on the success of Advantest's U3700 series of spectrum analyzers, launched in October 2008, whose two-channel input option was also an industry first. With this function, enabling two signals to be monitored in tandem, the U3700 was widely embraced by customers. Now, Advantest has launched the U3800 series in response to customer feedback requesting additional functionality, providing the ability to simultaneously measure the phase of two signals for more efficient identification of noise sources.

The U3800 also enables multi-pass analysis, and greatly simplifies the process of identifying and suppressing EM radiation noise. The U3800 series utilizes a new "X math" (pronounced "cross math") function for comparative analysis of inputs from two channels. This function displays the waveforms of both signals on a single coordinate plain, enabling operators to see the phase difference between the signals at a glance.

The U3800 is available in three configurations with varying frequency ranges and price points, allowing customers to select the product that best meets their needs.

Key Features and Specifications

  • Configurations - U3841, U3851, U3872
  • Frequency Range - U3841: 9k~3GHz, U3851: 9k~8GHz, U3872: 9k~43GHz
  • RF Input - 2 channels (simultaneous phase measurement possible)
  • Analysis Functions - power vs. time, frequency vs. time, phase vs. time, IQ vs. time, high-speed Fourier transform analysis, etc
  • Channel Balance - ±2.0dB
  • Phase Measurement - 15deg(CBW 100kHz/1msec per 1GHz)
Model # Channel 1 Channel 2
ADV U3841 9 kHz to 3 GHz 9 kHz to 3 GHz
ADV U3851 9 kHz to 8 GHz 9 kHz to 8 GHz
ADV U3872 9 kHz to 8 GHz
9 kHz to 43GHz
9 kHz to 8 GHz
9 kHz to 43GHz


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