# Anritsu MS4644A 40 GHz VectorStar Microwave Vector Network Analyzer (Pre-Owned) # Anritsu MS4644A 40 GHz VectorStar Microwave Vector Network Analyzer (Pre-Owned) ## Key Features At A Glance - Four frequency-coverage models: MS4642A (10 MHz–20 GHz), MS4644A (10 MHz–40 GHz), MS4645A (10 MHz–50 GHz), and MS4647A (10 MHz–70 GHz) - Optional 70 kHz low-end frequency extension (Option 070) for coverage down to 70 kHz - System dynamic range up to 122 dB at ports 1/2 from 0.01–2.5 GHz; up to 140 dB at b1/b2 with Option 051 - Specified noise floor as low as –110 dBm (10 Hz IF BW, –10 dBm port power) across 2.5–40 GHz - Up to 25,000 measurement points across 16 channels, or 100,000 points in single-channel mode - Remote operation via GPIB (IEEE 488.2), LAN (VXI-11), and USB (USBTMC) with SCPI command support - Comprehensive calibration support: SOLT, SSLT, SSST, SOLR, LRL/LRM, A-LRM, and AutoCal methods - Optional Active Measurements Suite (Options 061/062) adds step attenuators, bias tees, and direct access loops The Anritsu MS4640A Series VectorStar is a family of microwave vector network analyzers designed for high-performance broadband network analysis. The series comprises four base models — the MS4642A covering 10 MHz to 20 GHz, the MS4644A to 40 GHz, the MS4645A to 50 GHz, and the MS4647A to 70 GHz — with each instrument operating slightly beyond its nominal upper frequency as documented in the extended operating frequency table. An optional 70 kHz low-end frequency extension (Option 070) brings the lower limit down to 70 kHz, with operation allowed to 40 kHz. The MS4640A Series supports a wide range of S-parameter and ratio measurements: S11, S21, S22, S12, and any user-defined combination of a1, a2, b1, b2, and reference signals. Measurement domains include frequency domain, power domain, CW draw, and — with Option 002 — time (distance) domain. Frequency sweeps may be linear, CW, or segmented; power sweeps support linear, log, constant power, or constant power slope over frequency. Optional capabilities include Time Domain (Option 002), Receiver Offset for mixer and frequency-translated device measurements (Option 007), Noise Figure (Option 041), Direct Access Loops (Option 051), and the Active Measurements Suite with step attenuators and bias tees (Options 061/062). ValueTronics International, LLC stocks, tests, and ships microwave instruments from its 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Pre-owned MS4640A Series VNAs are physically inspected and performance-verified by our technicians before shipping, with the condition grade reflecting measured performance rather than a seller's description. New MS4640A Series instruments and accessories are sold through our authorized Anritsu distribution relationship. ## Compare Other Models in This Series The MS4640A Series VectorStar comprises four microwave VNA models distinguished primarily by upper frequency coverage: the MS4642A reaches 20 GHz, the MS4644A reaches 40 GHz, the MS4645A reaches 50 GHz, and the MS4647A reaches 70 GHz. All four models share the same 10 MHz lower frequency limit in their standard configuration, the same 6U chassis, the same Windows-based veCPU and 10.4-inch touch-screen interface, the same 16-channel/16-trace measurement architecture, and the same remote control interfaces over GPIB, LAN, and USB. Most optional capabilities — Time Domain (Option 002), Receiver Offset (Option 007), the 70 kHz Low-End Frequency Extension (Option 070), Direct Access Loops (Option 051), the Active Measurements Suite (Options 061/062), and Noise Figure (Option 041) — are available across the family. The MS4647A specifically supports Broadband/Millimeter-Wave connection to the ME7838A system via Options 080 and 081; all four models support banded Millimeter-Wave connection via Options 082 and 083. Each pre-owned model below is its own dedicated product page with condition-matched pricing. Click through to the specific frequency-coverage variant that fits your application — pricing and availability are listed individually per model. The most visible difference across the MS4640A Series is upper frequency limit: 20 GHz on the MS4642A, 40 GHz on the MS4644A, 50 GHz on the MS4645A, and 70 GHz on the MS4647A. The MS4642A and MS4644A use K (2.92 mm) test port connectors; the MS4645A and MS4647A use V (1.85 mm) test port connectors. Output default power is +5 dBm on the MS4642A and MS4644A (standard or with options); on the MS4645A and MS4647A it is –3 dBm standard and –10 dBm with Options 051, 061, or 062. Maximum rated leveled port power varies by model and band — for example, the MS4642A delivers +13 dBm from 2.5 to 20 GHz standard, while the MS4647A delivers –3 dBm at 67–70 GHz standard. System dynamic range and noise floor specifications also differ by band and model; see the comparison table and the detailed specification sections (sections 2, 6, and 7 of the datasheet) for full per-band data. Model Frequency Range Test Port Connector Max Source Power **MS4644A** 10 MHz to 40 GHz K (male) +9 dBm (2.5 to 20 GHz) MS4642A 10 MHz to 20 GHz K (male) +13 dBm (2.5 to 20 GHz) MS4645A 10 MHz to 50 GHz V (male) +6 dBm (2.5 to 5 GHz) MS4647A 10 MHz to 70 GHz V (male) +6 dBm (2.5 to 5 GHz) Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - User Documentation CD - Optical USB Mouse - Power Cord ## Product Core & Specifications Specification Value Frequency Performance (Operating Frequency) MS4642A Operating Frequency 10 MHz to 20.2 GHz MS4644A Operating Frequency 10 MHz to 40.5 GHz MS4645A Operating Frequency 10 MHz to 50.5 GHz MS4647A Operating Frequency 10 MHz to 70 GHz Optional Low-End Extension (Option 070) 70 kHz to 10 MHz coverage (allowed to 40 kHz) Frequency Resolution, Accuracy, and Stability Resolution 1 Hz Accuracy ± 5 x 10⁻⁷ Hz/Hz (at time of calibration) Stability < 5 x 10⁻⁹/°C over 0 °C to 50 °C; < 1 x 10⁻⁹/day aging Output Default Power MS4642A, MS4644A (Standard / Option 051, 061, 062) +5 dBm / +5 dBm MS4645A, MS4647A (Standard) \-3 dBm MS4645A, MS4647A (Option 051, 061, 062) \-10 dBm Phase Noise (SSB at 10 kHz offset) < 0.01 GHz \-78 dBc/Hz 0.01 to 2.5 GHz \-84 dBc/Hz 2.5 to 5 GHz \-84 dBc/Hz 5 to 10 GHz \-78 dBc/Hz 10 to 20 GHz \-72 dBc/Hz 20 to 40 GHz \-66 dBc/Hz 40 to 67 GHz \-61 dBc/Hz 67 to 70 GHz \-61 dBc/Hz Harmonics and Spurious Harmonics (second and third) \-20 dBc (across full range) Non-Harmonic Spurious (>1 kHz offsets, <0.01 GHz) \-20 dBc Non-Harmonic Spurious (>1 kHz offsets, ≥0.01 GHz) \-30 dBc Measurement Capabilities 2-Port Measurements S11, S21, S22, S12, and any user-defined combination of a1, a2, b1, b2, and 1 Domains Frequency, Power, CW Draw, and Time (Distance) Domain Frequency Sweep Types Linear, CW, or Segmented Power Sweep Types Linear, Log, constant power, or constant power slope (dB/GHz) Channels and Traces 16 channels, each with up to 16 traces Measurement Data Points (25,000) 2 to 25,000 points in up to 16 channels Measurement Data Points (100,000) 2 to 100,000 points in single channel IF Bandwidth 1, 3, 10, 30, 100, 300 Hz; 1, 3, 10, 30, 100, 300 kHz; 1 MHz Markers 12 markers per trace (up to 3,072 total) Calibration Methods SOLT Short-Open-Load-Through with Fixed or Sliding Load SSLT / SSST Offset-Short / Triple-Offset-Short with Fixed or Sliding Load SOLR / Unknown Through Short-Open-Load-Reciprocal (SSLR, SSSR) LRL / LRM Line-Reflect-Line / Line-Reflect-Match Advanced LRM A-LRM for improved on-wafer calibrations AutoCal Automatic Calibrator support with Thru Update Recommended Calibration Cycle 12 months Display, Computing, and Storage CPU Intel I5 Display 26 cm (10.4") Color XGA Touch-Screen LCD Storage Serial-ATA Solid State Drive (> 30 GB), rear-panel accessible/removable Operating System Windows XP Professional Remote Operability GPIB IEEE 488.2, 1 MB/s data transfer LAN VXI-11 protocol, 2.5 MB/s data transfer USB USBTMC protocol, 5.5 MB/s data transfer Drivers National Instruments LabVIEW, LabWindows/CVI, .NET/COM for Windows Triggering Internal, External, GPIB Single point, Single Sweep, Single Channel, All Channels Front Panel Test Ports MS4642A and MS4644A Test Ports K (male), Universal exchangeable connectors MS4645A and MS4647A Test Ports V (male), Universal exchangeable connectors Damage Input Levels +27 dBm maximum, 40 VDC maximum Rear Panel Connections AC Power Input 350 VA max, 90 to 264 VAC, 47 to 63 Hz (power factor controlled) 10 MHz In BNC (female), -10 to +3 dBm, 50 Ω nominal 10 MHz Out BNC (female), 0 ± 5 dBm sinusoidal, 50 Ω nominal Analog In 1 & 2 BNC (females), -10 V to +10 V range, 60 kΩ input impedance Ext Analog Out BNC (female), -10 V to +10 V, low impedance drive Ext Trigger / Lock Status BNC (female), 0 to 3.3 V, > 100 kΩ, 100 ns min pulse width USB Control Port Type B USB 2.0 for remote operation LAN Port 10/100BaseT Ethernet VGA Port 15-pin mini D-Sub, 1024 x 768 minimum resolution Mechanical & Environmental Height 267 mm body (6U), 286 mm between feet outer edges Width 426 mm body, 457 mm feet outer edges, 487 mm handles outer edges **Important:** Damage input level at the test ports is +27 dBm maximum, 40 VDC maximum. Direct Access Loops are limited to +20 dBm maximum, 0 VDC maximum.**Important:** Test port cables, calibration kits, AutoCal modules, and verification kits are not included with the base VNA and must be ordered separately. The included accessories with each VNA are the User Documentation CD, Optical USB Mouse, and Power Cord.**Important:** Specifications do not include effects of any user cables attached to the instrument.**Important:** All specifications and characteristics apply after 90 minutes of warm-up time with the instrument left in the ON state, over the 25 °C ± 5 °C temperature range. Error-corrected specifications apply over 23 °C ± 3 °C with < 1 °C variation from calibration temperature.**Important:** Recommended calibration cycle is 12 months.**Important:** Damage input levels at front panel test ports: +27 dBm maximum, 40 VDC maximum. Damage input levels at Direct Access Loops: +20 dBm maximum, 0 VDC maximum.**Important:** If the VNA is to be attached to a public-accessible network, best practices recommend a user-installed anti-virus software application.Recommended pairing: the 36585-Series Precision AutoCal modules (K to 40 GHz; V to 70 GHz) provide automated 12-term calibration with corrected characteristics that match or exceed sliding-load SOLT performance on the MS4640A Series. ## About this used unit - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 0.0 USD - 1260.0 USD - **Vendor:** Anritsu - **Type:** Network Ana - **Tags:** Analyzers, Anritsu, Manufacturers, Network, product_manual_group_1, Product_used ## Variants | Variant | Price | Available | |---------|-------|-----------| | None | 0.00 USD | In stock | | NIST Traceable | 700.00 USD | In stock | | NIST Traceable with Full Data | 980.00 USD | In stock | | ISO IEC 17025 Accredited | 1260.00 USD | In stock | ## Images - Anritsu MS4644A 40 GHz VectorStar Microwave Vector Network Analyzer (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/ms4644a-anritsu-network-analyzer-used) > Updated: 2026-05-30