Used BRISTOL INSTRUMENTS 428A Buy / Purchase at the right Price.

Custom-Cal has a used BRISTOL INSTRUMENTS 428A Multi-Wavelength Meter in stock and ready for purchase at a fair price. All units sold by Custom-Cal are provided with an applicable NIST traceable calibration/performance verification and a 90 day warranty (unless otherwise noted). With this added service, you can be confident that you are buying a fully functional unit that meets OEM specifications.

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BRISTOL INSTRUMENTS 428A Multi-Wavelength Meter

General description of the used BRISTOL INSTRUMENTS 428A for sale.
The Bristol instruments 428A Multi-Wavelength Meter combines proven Michelson interlerometer-based technology with fast Fourier transform analysis. This results in the ability to measure the wavelength and power of up to 250 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 428A system automatically calculates OSNR to greater than 40 dB. The wavelength accuracy of the 428A system is maintained over long periods of time because it is continuously calibrated with a built-in HeNe laser wavelength standard. In order to achieve the highest accuracy, the model 428A uses a single-frequency HeNe laser that is stabilized using a precise balanced longitudinal mode technique. Specifications. Optical Signal: CW and modulated. Wavelength Range: 1270 to 1650 nm (182 to 236 THz). Absolute Accuracy: ± 0.2 parts per miliion, (± 0.3 pm at 1550 nm). Differential Accuracy: ± 0.15 parts per miliion. Minimum Resolvable Seperation: 15 GHz, equal power lines input. Wavelength Display Resolution: 0.0001 nm. Power Calibration Accuracy: ± 0.5 dB, at ±30 nm from 1310 and 1550 nm. Flatness: ± 0.2 dB (1270 - 1600 nm), 30 nm from any wavelength. Linearity: ±0.3 dB (1270 - 1600 nm), lines above -30 dBm. Polarization Dependence: ± 0.5dB (1270-1600 nm). Power Display Resolution: 0.01 dB. Signal-To-Noise Ratio: > 40 dB with 100 averages, 100 GHz channel spacing; > 35 dB with 100 averages. 50 GHz channel spacing. Optical Input Signal Sensitivity Single line input: -40 dBm (1270 to 1600 nm), -30 dBm (1600 to 1650 nm). Optical Input Signal Sensitivity Multiple line input: 30 dB below total input power, but not less than single line input sensitivity. Maximum Power Displayed level: +10 dBm, sum of all lines input. Maximum Power Safe level: +18 dBm, sum of all lines input. Return Loss: 35 dB (UPC), 50 dB (APC). Maximum Number of Lines: 250. Optical Input: 9/125 um single-mode fiber (FC/UPC or FC/APC). Instrument Interface: SCPI via USB 2.0, Ethernet. and optional GPIB.

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