Anritsu MS46131A Modular 1 port Vector Network Analyzer

  • 1-port VNA with frequency options from 1 MHz to 8 GHz / 20 GHz / 43.5 GHz
  • Guaranteed performance to 43.5 GHz with Extended-KTM ports
  • PC control takes advantage of external computer processing power and functionality
  • Small and lightweight package enables direct connection to the DUT
  • No on-board data storage eliminates the need for data purging in secure applications
  • All ShockLine VNAs share common software supporting GUI and program compatibility
  • Time domain with time gating option enables easier and faster fault identification

The world’s only One Port VNA with Extended-KTM ports specified to 43.5 GHz. The ShockLine MS46131A from the family of Anritsu vector network analyzers is packaged in a compact chassis and is externally controlled via USB from a user supplied PC running the same Graphical User Interface (GUI) software as the rest of the ShockLine family of VNAs. The ShockLine MS46131A benefits from patented shockline VNA-on-chip technology that simplifies the internal VNA architecture at high frequencies, reduces instrument cost, and enhances accuracy and measurement repeatability. The combination of lower cost, small size, and good performance make the ShockLine MS46131A series VNAs ideal for passive device test applications where performance and small form factor are desired.

Standard Capabilities

Operating Frequencies

  • MS46131A-010 1 MHz to 8 GHz
  • MS46131A-020 1 MHz to 20 GHz
  • MS46131A-043 1 MHz to 43.5 GHz

Measurement Parameters

  • 1-Port Measurements S11 or any user-defined combination of a1, b1, 1
  • 2-Port Measurements (with PhaseLync option) S11, S21, S22, S12, and any user-defined combination of a1, a2, b1, b2, 1. Maximum Efficiency Analysis, Mixed-mode SDD, SDC, SCD, SCC
  • Domains Frequency Domain, Time (Distance) Domain (Option 002)


  • Frequency Sweep Types Linear, Log, CW, or Segmented

Display Graphs

  • Single Rectilinear Graph Types Log Magnitude, Phase, Group Delay, Linear Magnitude, Real, Imaginary, SWR, Impedance
  • Dual Rectilinear Graph Types Log Mag and Phase, Linear Mag and Phase, Real and Imaginary
  • Circular Graph Types Smith Chart (Impedance), Polar

Measurements Data Points

  • Maximum Data Points 2 to 16,001 points

Limit Lines

  • Limit Lines Single or segmented. 2 limit lines per trace. 50 segments per trace.
  • Single Limit Readouts Uses interpolation to determine the intersection frequency.
  • Test Limits Both single and segmented limits can be used for PASS/FAIL testing.

Ripple Limit Lines

  • Limit Lines Single or segmented. 2 limit lines per trace. 50 segments per trace.
  • Ripple Value Absolute Value or Margin
  • Test Limits Both single and segmented limits can be used for PASS/FAIL testing.


  • Point-by-Point Point-by-point (default), maximum number of averages = 200
  • Sweep-by-Sweep Sweep-by-sweep, maximum number of averages = 4096

IF Bandwidth

  • 10, 20, 50, 70, 100, 200, 300, 500, 700 Hz
  • 1, 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 200, 300 kHz

Reference Plane

  • Line Length or Time Delay The reference planes of a calibration or other normalization can be changed by entering a line length or time delay.
  • Dielectric Constants Dielectric constants may be entered for different media so the length entry can be physically meaningful.
  • Dispersion Modeling Dispersion modeling is used in the cases of microstrip and waveguide to take into account frequency dependent phase velocities.
  • Attenuation Attenuation (with frequency slope) and constant phase offsets can be entered to better describe any reference plane distortions. The frequency dependence exponent is changeable.
  • Auto Modes Automatic reference plane finding tools are available for phase alone or phase + magnitude. These routines do a fitting process on phase or phase and magnitude to estimate the reference plane location and enter correcting values.
  • De-embedding For more complete reference plane manipulation, the full de-embedding system can also be used.

Measurement Frequency Range

  • Frequency Range Change Frequency range of the measurement can be narrowed within the calibration range without recalibration.
  • CW Mode CW mode permits single frequency measurements also without recalibration.
  • Interpolation Not Activated If interpolation is not activated, the subset frequency range is forced to use calibration frequency points.
  • Interpolation Activated If interpolation is activated, any frequency range that is a subset of the calibration frequency range can be used, but there may be some added interpolation error.

Channels, Display, and Traces

  • Channels and Traces 16 channels, each with up to 16 traces
  • Display Colors Unlimited colors for data traces, memory, text, markers, graticules, and limit lines
  • Trace Memory and Math Up to 20 trace memories per channel can be used to store trace measurement data for later display or subtraction, addition, multiplication or division with current measurement data. The trace data can be saved and recalled.
  • Inter-trace Math Any two traces within a channel can be combined (via addition, subtraction, multiplication, or division) and displayed on another trace. An equation editor mode is also available that allows the combination of trace data, trace memory and S-parameter data in more complex equations. Over 30 built-in functions are available. Simple editing tools and the ability to save/recall equations are also provided.

Scale Resolution

  • Minimum per division, varies with graph type.
  • Log Magnitude 0.001 dB
  • Linear Magnitude 10 μU
  • Phase 0.01°
  • Group Delay 0.1 ps
  • Time 0.0001 ps
  • Distance 0.1 μm
  • SWR 10 μU
  • Power 0.01 dB


  • Markers 12 markers + 1 reference marker
  • Marker Coupling Coupled or decoupled
  • Marker Overlay Display markers on active trace only or on all traces when multiple trace responses are present on the same trace
  • Marker Data Data displayed in graph area or in table form
  • Reference Marker Additional marker per trace for reference
  • Marker Statistics Mean, maximum, minimum, standard deviation. Per trace or over a marker region
  • Marker Search and Tracking Search and/or track for minimum, maximum, peak, or target value. Multiple marker search ranges per trace are available.


  • Filter Parameters Display bandwidth (user-selectable loss value), corner and center frequencies, loss, Q, and shape factors.
  • S-Parameter Conversion Z Reflection Impedance, Z Transmission Impedance, Y Reflection Admittance, Y Transmission Admittance, 1/S


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