The ILX Lightwave FOM-7900B Mainframe is a modular fiber optic test platform that integrates up to 8 plug-in modules for multi-channel wavelength, power measurement, and switching applications. Multiple mainframes link together to support up to 200 channels controlled from a single GPIB address, making it suitable for WDM/CWDM testing, EDFA and SOA characterization, and fiber optic component analysis.
Technical Specifications
System Architecture
• 8 module bays per mainframe
• Up to 24–25 additional FOM-7900B mainframes can be linked for 200-channel density
• Single GPIB address controls all linked systems
Laser Source Modules (FOS-79800 Series compatible)
• Wavelength range: 1475–1625 nm, plus service channels at 1310, 1480, 1510, and 1625 nm
• Tuning range per channel: 1.7 nm with 0.001 nm resolution
• Wavelength stability: ±3 pm
• Output power: Up to 20 mW per channel
• Power stability: ±0.003 dB
• Picometer resolution capability
Modulation
• Internal frequency: 0.1–500 kHz
• External input frequency: 1–500 kHz
• Waveform: TTL, 50% ±1% duty cycle, 100% depth, <250 ns rise/fall time
• Synchronous control: Up to 200 modules across linked mainframes
• Channel-to-channel synchronization: <100 ns
• Jitter: <50 ns
• External trigger: TTL, Active Low, 100 ns minimum pulse width
Interfaces
• GPIB/IEEE-488.2
• RS-232
• LabVIEW drivers available
Physical
• Dimensions: 22 in × 18 in × 12 in
• Weight: 15 lbs (mainframe only)
• Operating temperature: +15°C to +35°C
• Warm-up time: Minimum 1 hour for rated stability
• Power: Standard AC source
– Key Features
• Supports WDM DFB fiber optic sources, fiber optic switches, and dual power meter modules
• Customer-specified wavelength, output power, connector type, and fiber options
• PM alignment available
• Coherence control for narrow linewidth sources
• TTL modulation output capable of driving additional mainframes
• Module hot-swap requires power-off; ESD precautions required
– Typical Applications
• WDM and CWDM system testing
• EDFA and SOA characterization
• Multi-channel fiber optic component analysis
• High-density channel environments requiring scalable architecture
– Compatibility & Integration
Accepts FOS-79800D, FOS-79800E, FOS-79800F laser source series; FOS-79710 fiber optic switches; and DPM-79810 dual power meter modules. Automated test control via GPIB and LabVIEW.
