Signal Analyzer Repair and Calibration Services at Aumictech

Precision Restoration for RF, Microwave & Spectrum Analysis Instruments

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Introduction: The Role of Signal Analyzers in Modern Electronics and Communications

Signal analyzers—often referred to as spectrum analyzers, vector signal analyzers (VSAs), or signal/spectrum measurement systems—are among the most important instruments in RF, microwave, and wireless test environments. They are used to measure:

• Frequency content of signals
• Modulation accuracy and distortion
• Spectral purity and harmonic content
• Phase noise and spurious emissions
• Bandwidth and signal envelope behavior

From 5G and satellite communication to radar and IoT device development, a calibrated signal analyzer is essential for verifying system integrity, meeting regulatory compliance, and driving product innovation.

At Aumictech, we specialize in the repair, refurbishment, and NIST-traceable calibration of signal analyzers from all leading manufacturers. Whether you’re dealing with drift, internal noise, fan failure, or complete system faults, we restore your unit to manufacturer-grade performance—at a fraction of the OEM cost and lead time.

Signal Analyzers We Repair and Calibrate

General-Purpose Spectrum Analyzers

• Used for frequency domain analysis up to 3–50 GHz
• Common in wireless, telecom, broadcast, and R&D labs

Vector Signal Analyzers (VSA)

• Ideal for measuring digital modulation schemes (QAM, PSK, OFDM)
• Used in 4G/5G development, Wi-Fi, LTE, radar, and satellite systems

Real-Time Spectrum Analyzers (RTSA)

• Used in pulsed RF, radar, spectrum monitoring, and EMI testing
• Capture transients with real-time bandwidth up to several GHz

Modular/PXI Signal Analyzers

• Embedded in ATE and production test racks
• Require software calibration and integration checks

Brands and Models We Support

Keysight / Agilent / HP

• N9020A/B MXA, N9030A/B PXA, N9000A CXA
• E4402B / E4440A PSA Series
• 8590 Series (legacy spectrum analyzers)
• PXIe VSA Modules (M9290A, M9393A)

Rohde & Schwarz

• FSV / FSW / FSVR / FSVA Series
• FSEA / FSU / FSIQ (legacy)
• RTO/RTM (combined scope/spectrum)

Tektronix

• RSA Series (RSA306B, RSA5000, RSA6000)
• MDO3000 / MDO4000 Mixed Domain Oscilloscopes

Anritsu

• MS2720T, MS2830A, MS2690A, MS2090A Field Master
• Spectrum Master, Signal Master, FieldFox Integration

Others

• Signal Hound, Rigol, GW Instek, Advantest, B&K Precision

Why Signal Analyzer Calibration Is Essential

Signal analyzers measure high-frequency waveforms with extreme sensitivity. Over time, internal components such as mixers, filters, amplifiers, and ADCs drift or degrade, impacting the accuracy of:

• Frequency and amplitude readings
• Modulation error vector magnitude (EVM)
• Bandwidth and spectral flatness
• Phase noise characterization
• Harmonic and spurious content detection

Common issues from uncalibrated or faulty units include:

• Amplitude inaccuracy (e.g., showing -20 dBm when signal is -10 dBm)
• Frequency drift (e.g., showing 2.449 GHz instead of 2.450 GHz)
• Flatness deviation across sweep range
• Internal noise floor rising, masking weak signals
• Display errors, failed boot sequences, or measurement lockups
• I/O port malfunction, especially USB, LAN, and GPIB interfaces
• Fan failure or PSU degradation, leading to overheating

Aumictech’s Signal Analyzer Repair & Calibration Process

We follow a comprehensive, traceable, and industry-compliant process to ensure every signal analyzer leaves our facility in full working order.

Step 1: Intake Diagnostics

• Functional test across full frequency and amplitude ranges
• RF port inspection and VSWR evaluation
• Boot logs and self-test diagnostics
• Error logs and firmware check
• Internal fan and PSU diagnostics
• Optional pre-calibration measurement report

Step 2: Internal Inspection and Cleaning

• Disassembly and visual inspection under magnification
• Dust and debris removal with anti-static cleaning tools
• Thermal compound and fan cleaning
• Shielding and board ground integrity check
• Display interface and control knob cleaning (for benchtop models)

Step 3: Electrical & RF Pathway Restoration

• Replace damaged or failing components: attenuators, mixers, filters, ADCs, relays
• Repair or replace USB, GPIB, and LAN interfaces
• Internal signal path routing checks and RF switch diagnostics
• Reflow soldering of dry joints or capacitor replacement
• Firmware refresh or memory reset (if corrupted)

Step 4: Calibration – NIST-Traceable & Multi-Point

• Frequency calibration using rubidium- or GPS-disciplined 10 MHz standard
• Amplitude calibration across multiple dBm levels (-120 to +10 dBm typical)
• Flatness and gain correction across full frequency span (up to 50 GHz)
• Phase noise validation using known clean RF sources
• Noise floor and dynamic range verification
• Modulation analysis testing (for VSA/RTSA)
• Use of certified reference signal generators and attenuators

Step 5: Final Validation & Certification

• Post-calibration performance test
• Cross-check against OEM specifications
• Documentation of all test points
• Issuance of NIST-traceable calibration certificate
• Optional: Before/after deviation charts and calibration graphs
• 90-day service warranty on repairs

Optional Add-On Services

• Touchscreen or front-panel repair
• Battery or RTC replacement (for clock retention)
• Firmware upgrade and remote software licensing
• LAN/GPIB interface validation
• Rackmount kit installation or conversion
• Custom test scripting or remote control integration

Calibration Frequency Recommendation

Who We Serve

• Wireless R&D Labs (5G, Wi-Fi 6E, mmWave)
• Satellite and Aerospace Communications Companies
• Defense Contractors and Sensor Developers
• Semiconductor and RFIC Manufacturers
• University RF Labs and Electrical Engineering Departments
• Automotive Radar and V2X Development Teams
• Regulatory Compliance Test Houses

Why Aumictech?

• U.S.-based service lab with short lead times
• Support for legacy and modern analyzers
• NIST-traceable, standards-compliant calibration
• In-house repair + calibration = 1-stop solution
• Fast turnaround (typically 3–7 days)
• Friendly pricing and no hidden fees
• Technical documentation for audit readiness

Testimonials

“Our N9030A PXA was showing amplitude drift and failing flatness checks. Aumictech restored its performance, replaced a damaged front-end attenuator, and returned it with a clean calibration certificate.”
– RF Validation Engineer, California

“We had two E4440A units locked on boot. Aumictech fixed the power board, reflashed the firmware, and now both are back online for our EMC testing line.”
– EMC Lab Director, Michigan

Get a Quote for Signal Analyzer Repair or Calibration

If your signal analyzer is giving inconsistent readings, failing internal tests, or overdue for calibration, contact Aumictech now.

Email: sales@aumictech.com
Shipping: U.S. Nationwide & International
Website: www.aumictech.com

Final Thoughts

Your signal analyzer is your RF lab’s most valuable verifier. Don’t let drift, noise, or failure compromise your test results. At Aumictech, we provide the engineering expertise, certified equipment, and professional care to restore your signal analyzer to peak condition — with documentation that stands up to any audit or compliance review.

Signal accuracy begins with signal integrity. Let Aumictech keep your measurements true.