Service & Repair of HP 70951A Optical Spectrum Analyzer OSA

HP 70951A & 70951B Optical Spectrum Analyzer – Professional Repair, Modular Diagnostics & NIST-Traceable Calibration

We offer expert repair, refurbishment, and calibration services for the HP 70951A and 70951B Optical Spectrum Analyzer (OSA) modules, part of the HP 70000 Modular Measurement System. These high-performance modules are used in a wide range of fiber optic, photonics, and DWDM applications, known for their precision, wide wavelength range, and seamless integration into modular mainframes. If your module is showing signal detection issues, wavelength drift, or communication errors with the mainframe, our skilled technicians can restore it to full functionality using advanced diagnostics and certified calibration.

Our Repair & Calibration Workflow

In-Depth Module Evaluation
Each 70951A or 70951B unit undergoes complete system diagnostics inside a working HP 70000 mainframe, including:

• Wavelength accuracy and trace repeatability testing

• Optical signal detection sensitivity

• Sweep and span functionality

• Display menu access (where applicable) and remote communication

• Input connector inspection (FC/PC or FC/APC)

• Module initialization and bus communication within the mainframe

We test using calibrated laser sources and optical references to simulate real operating environments and uncover subtle performance issues.

Common Issues We Repair

• No optical signal or fluctuating measurement

• Inaccurate or drifting wavelength readings

• Detector degradation or complete failure

• Module not initializing or unrecognized by mainframe

• Analog board failures or signal processing errors

• Power supply faults or noisy voltage lines

• Sweep or trace freeze issues

• Damaged input ports or worn fiber connectors

Component-Level Repair & Refurbishment
We perform deep board-level diagnostics and component replacement, including:

• Power regulation circuits and analog front-end restoration

• A/D conversion and digital logic troubleshooting

• Replacement of memory modules, op-amps, capacitors, and regulators

• Repair of inter-module communication pathways

Optical Cleaning & Realignment
Internal optical paths are cleaned and checked for signal integrity. Fiber inputs, lens assemblies, and beam paths are realigned to restore signal strength, reduce insertion loss, and improve trace quality.

Mainframe Compatibility Testing
Each repaired 70951A/B is tested in a certified HP 70000 Series system. We validate trace generation, calibration memory access, softkey functionality, and remote control communication (GPIB or other available ports).

NIST-Traceable Calibration
After repairs, we perform a full NIST-traceable calibration, including:

• Wavelength accuracy verification using certified reference lasers

• Optical power response and linearity tests

• Sweep and resolution bandwidth accuracy

• Trace noise floor and signal repeatability validation
  A detailed calibration certificate is included with performance test data.

Why Choose Us?

• Proven expertise with HP 70951A, 70951B, 70950 series, and HP 70000 Modular Measurement Systems

• Advanced test equipment for full system integration and signal simulation

• Fast turnaround time – typically 3–5 business days

• Warranty on all repairs and a 15-day Right of Return

• Worldwide shipping support and professional protective packaging

• Multiple payment options: ACH, credit card, wire transfer, and PayPal

Ideal For:

• Labs and facilities using HP 70951A/B modules in legacy optical test setups

• Engineers troubleshooting module startup or accuracy issues

• Refurbishers and resellers restoring 70000 series test equipment

• Teams requiring certified calibration for compliance or quality systems

Restore Accuracy & Performance to Your HP 70951A or 70951B OSA

If your HP 70951A or 70951B Optical Spectrum Analyzer is malfunctioning, producing unstable measurements, or not initializing, we’re here to help. Our detailed diagnostics, component-level repair, and NIST-traceable calibration process ensures your module returns to precise, reliable operation—fully compatible with your HP 70000 mainframe system.

Request a quote today and let us restore your HP 70951A/B to peak performance.