The Newport / ILX Lightwave FOM-7900B is a high-performance, multi-channel fiber optic test system engineered for characterization of WDM, CWDM, EDFA, and SOA components. Its modular architecture supports up to 8 plug-in modules per mainframe, with cascading capability linking up to 24 additional mainframes for a total of 200 channels controlled from a single GPIB address.
Technical Specifications
System Architecture
• Up to 8 plug-in modules per mainframe
• Up to 24 mainframes linkable (200 total channels)
• Single GPIB control address for all channels
• Two-line, 20-character VFD display
• Mainframe: 12.7 kg; Typical module: 0.45 kg
• Dimensions: 14.0 cm × 45.1 cm × 44.5 cm
Modulation
• Internal modulation: TTL waveform, 0.1–500 kHz, 50% ±1% duty cycle, <250 ns rise/fall time
• External modulation input: TTL level, 1–500 kHz, <1 µs optical delay, <100 ns channel-to-channel synchronization, <50 ns jitter
• Modulation output: TTL level, <60 ns gate delay per mainframe, <50 ns jitter
• Synchronous modulation of up to 200 fiber optic source modules
Electrical Interface
• External trigger: TTL, active low, 100 ns minimum pulse width
• Load capability: 3 additional FOM-7900B mainframes in parallel
• Power: 100–120 VAC (1.5 A) or 220–240 VAC (0.8 A), 50/60 Hz
Environmental
• Operating temperature: 0°C–40°C
• Storage temperature: –40°C to 70°C
• Humidity: <90% RH, non-condensing
• CE Compliant
– Key Features
• Modular plug-in design for flexible configuration
• TTL modulation with picosecond-level jitter control (<50 ns)
• Multi-mainframe synchronization capability
• Vacuum fluorescent display with real-time channel selection feedback
• Support for DFB fiber optic sources and switching modules
– Typical Applications
• WDM and CWDM system testing
• EDFA and SOA characterization
• Multi-wavelength source configuration and control
• Long-duration stability monitoring of fiber optic components
– Compatibility & Integration
The FOM-7900B accepts plug-in modules including WDM DFB fiber optic sources (1475–1625 nm with service channels at 1310, 1480, 1510, 1625 nm) and 1×4 fiber optic switch modules. GPIB control enables integration into automated test systems.
