The Ando AQ7250 SM Fiber Mini OTDR is a compact, portable optical time domain reflectometer engineered for single-mode and multi-mode fiber network testing, fault detection, and loss measurement. Built for field installation, maintenance, and troubleshooting, it delivers high-speed operation via single-button control and an intuitive interface. The unit combines high-resolution measurements with extensive data storage—up to 999 screens and measurement conditions—supported by onboard OTDR analysis software and dual-language menus (English/Japanese).
Technical Specifications
Optical Performance
• Supported fiber types: Single-mode (10/125 µm), Multi-mode (850/1300 µm)
• Measurement wavelengths: 850 nm, 1300 nm, 1310 nm, 1550 nm, 1625 nm
• Dynamic range (SNR=1): 43/41 dB typical at 1310/1550 nm (AQ7255B); 36/34 dB at 1310/1550 nm (AQ7254B); 41.5/39.5/37 dB at 1310/1550/1625 nm (AQ7256B)
• Event dead zone: 3 m
• Attenuation dead zone: 8/9 m (1310/1550 nm); 10/12 m; 8/9/12 m (wavelength-dependent)
• Distance ranges: 2, 5, 10, 20, 40, 80, 160, 240 km
• Pulse widths: 10 ns to 20 µs (nine selectable options)
• Splice loss measurement: 0.5 dB detectable at 70 km within 20 seconds
• Return loss measurement: Up to 18 dB (near-end, single-mode unit)
Light Source
• Wavelengths: 1.31/1.55 µm and 1.31/1.55/1.625 µm variants
• Maximum output: -3 ± 2 dBm
• Stability: ±0.1 dB
• Laser class: Class 1 (FDA), Class 3A (IEC)
Display & Analysis
• 7.2-inch color LCD (640×480 dots) with selectable background
• Horizontal axis: 25 m to 240 km full-scale ranges; variable resolution
• Vertical axis: 0.2–7.5 dB/div scale; 0.001 dB read resolution
– Key Features
• Improved measurement algorithm for reduced processing time
• Extensive onboard storage with optional PCMCIA hard disk and IC memory card support
• Multi-wavelength capability across telecom C- and L-bands
• Variable pulse widths optimize near-field resolution and long-distance reach
– Typical Applications
• Long-haul single-mode fiber plant commissioning and maintenance
• Splice and connector characterization at extended distances
• Return loss assessment in optical networks
• Rapid field troubleshooting with minimal setup time
– Compatibility & Integration
The AQ7250 platform accepts interchangeable single-mode and multi-mode fiber units (AQ7254B, AQ7255B, AQ7256B) to match specific wavelength and dynamic range requirements. OTDR analysis software facilitates data interpretation and archival via removable media.
