The Agilent/Keysight N7745C is an 8-channel optical multiport power meter engineered for high-throughput measurements across fiber optic communication systems. This standalone instrument delivers simultaneous power acquisition and readout across multiple ports, optimizing measurement efficiency for multiport components including multiplexers, PON splitters, wavelength selective switches (WSS), and ROADMs.
Technical Specifications
Optical Performance
• 8 channels with InGaAs sensors
• Wavelength range: 1250 nm to 1650 nm
• Power measurement range: +10 dBm to −80 dBm
• Measurement speed: 1 µs minimum averaging time, up to 250 kHz bandwidth
• Data acquisition rate: up to 1 M samples/s per port
• Memory: 1 M samples per port plus 1 M sample buffer per port for continuous logging
• Dynamic range: up to 65 dB in swept and logging applications; fast power range switching supports stitching to achieve greater than 80 dB dynamic range
• Power uncertainty: ±2.5% at reference conditions
• Polarization dependence: <±0.01 dB typical
Connectivity & Interfaces
• LAN or USB control with browser-accessible user interface
• Data transfer up to 3× faster than previous models
• N7740 snap-on quad-adapter connectivity supporting MU, FC, SC, and LC connectors
• Bare fiber adapters for diameters up to 400 µm and 400–900 µm
• Optional N7740ZI one-click zeroing adapter for 4-port zeroing
Physical
• 1U height, half-rack width form factor
– Key Features
• Dual-ported RAM enables simultaneous measurement and readout
• Transient measurement with power threshold triggering
• Family-wide, common trigger concept
• High-speed data acquisition minimizes measurement delays
– Typical Applications
• Multiplexer and demultiplexer characterization
• PON splitter power distribution validation
• Wavelength selective switch insertion loss measurement
• ROADM optical performance verification
– Compatibility & Integration
Standalone operation; compact footprint integrates directly into existing test setups without external mainframe requirement.
