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428 Series Multi-Wavelength Meter

Test your WDM signals with the confidence that comes from reliable accuracy


Simultaneous measurement of wavelength, power, and OSNR

The 428 Series Multi-Wavelength Meter from Bristol Instruments combines proven Michelson interferometer-based technology with fast Fourier transform analysis in order to measure the wavelength, power, and OSNR of as many as 1000 discrete optical signals.

Wavelength is measured to an accuracy as high as ± 0.3 pm and power is measured to an accuracy of ± 0.5 dB. In addition, the 428 system automatically calculates OSNR to greater than 40 dB.

The result is precise and reliable wavelength testing of laser transceivers and WDM signals.

Reliable accuracy with continuous calibration

Two versions of the 428 Multi-Wavelength Meter are available. The model 428A is the most precise, providing an accuracy of ± 0.3 pm. For less exacting test requirements, the 428B system is a lower-priced alternative with a wavelength accuracy of ± 1.0 pm.

The wavelength accuracy of the 428 Multi-Wavelength Meter is maintained over long periods of time because the system is continuously calibrated with a built-in HeNe laser. This is the ideal reference source because its wavelength is well-known and fixed by fundamental atomic structure.

To verify the accuracy of the model 428, every system is rigorously tested with laser sources that are traceable to NIST standards.

Designed for convenience, built to last

Operation of the 428 Multi-Wavelength Meter is straightforward.

The optical signal enters the model 428 through an FC (UPC or APC) fiber-optic connector on the front panel. The system’s high sensitivity results in an input power requirement as low as -40 dBm (0.1 µW). Automatic attenuation instantly adjusts the signal for optimum performance.

The controls of the 428 system are conveniently located on the front panel along with the measurement display. The wavelength, power, and OSNR data can be reported in a variety of formats. Data from a specific optical channel can be displayed, or lists of data from all channels, sorted by wavelength or power, can be reported.

The measurement information can also be sent to a PC using a library of SCPI commands via standard USB or Ethernet interface, or an optional GPIB interface.

The rugged design of the 428 Multi-Wavelength Meter provides long-term reliable operation, backed by a five-year warranty on all parts and labor. This results in less downtime and the lowest cost of ownership available.

  • Wavelength measured to an accuracy as high as ± 0.3 pm
  • Continuous calibration with a built-in wavelength standard
  • Measurement confidence level ≥ 99.7%
  • Traceable to NIST standards
  • Power measured to an accuracy of ± 0.5 dB
  • Automatically calculates OSNR to > 40 dB
  • Operates with CW and modulated signals
  • Interfacing via SCPI using USB, Ethernet, or GPIB
  • Rugged design for manufacturing environments
  • Includes 5 year warranty