The Wandel & Goltermann OSA-155 is a DWDM System Analyzer built for field characterization of optical components and systems in telecommunications networks. It simultaneously measures wavelength, power, and optical signal-to-noise ratio (OSNR) across multiple carriers in the 1450–1650 nm band. The instrument combines portable design with battery operation, delivering full measurement capability during installation, maintenance, and troubleshooting without dependence on external power.
Technical Specifications
Optical Measurements
• Wavelength range: 1450 nm to 1650 nm
• Channel spacing compatibility: 0.4 nm / 50 GHz minimum
• Simultaneous channels displayed: up to 32 (full power table)
• Simultaneous channels measured: up to 256 (reduced power mode)
• Monochromator resolution: 0.1 nm / 12.5 GHz
• Optical bandwidth (FWHM): <0.1 nm
• Maximum channel power: +15 dBm
• Maximum total input level: +30 dBm
Measurement Functions
• Individual carrier wavelength and frequency
• Individual carrier power level
• Optical Signal-to-Noise Ratio (OSNR)
• Filtered monitor output (typically 5 dB attenuation) for bit error, jitter/wander, and pointer analysis
Power Supply
• AC: 100–120 V and 200–240 V nominal
• External DC: 12–26 V (minimum 60 W)
• Built-in rechargeable batteries: up to 4 hours intermittent operation
• Automatic source selection with battery backup
Physical & Interfaces
• Weight: ≤9 kg (including battery)
• Display: 10.4-inch TFT color
• Data output: RS-232 serial and Centronics parallel
• Control: RS-232 or GPIB
– Key Features
GRAPH Mode renders the optical spectrum graphically with trace measurement and report preparation tools. WDM Mode automatically identifies and measures individual channels, tabulating wavelength, frequency, and power with statistical analysis. Filter Mode (version BN 2260/04) locks the monochromator to a fixed wavelength for single-channel isolation. Internal reference source enables automatic wavelength calibration.
– Typical Applications
Field service, DWDM system commissioning, carrier power and OSNR verification, optical supervisory channel (OSC) analysis, component characterization during installation and maintenance.
– Compatibility & Integration
Operable with ANT-20 controllers via RS-232 or GPIB for combined jitter, wander, and error analysis. Printer connectivity (serial and parallel) supports on-site documentation and reporting.
