VFLs work well for exposed lengths of fiber near a patch panel by illuminating bad connections and breaks. They are not very helpful for cable runs more than a few meters, or when the cable is not visible or accessible, or when the laser light can’t penetrate the jacket.
Optical Time Domain Reflectometers (OTDR) provides graphical data and analysis along the entire length of a cable, way beyond the reach of a VFL, but they can be expensive and require more time and skill to operate.
Fiber OneShot PRO and Fiber QuickMap fill the gap between a VFL and an OTDR. These models have the simplicity of a VFL, and provide distance and power information on high losses, breaks, and the end of the fiber. They also identify live fiber.
Feature | Typical VFL | Fiber OneShot PRO and Fiber QuickMap | Typical OTDR |
Illuminates high loss areas | ✓ | ||
One button operation | ✓ |
✓ |
|
Long range |
✓ |
✓ | |
Live fiber detection |
✓ |
✓ | |
Numeric distance display |
✓ |
✓ | |
Numeric reflective loss (dB) display |
✓ |
✓ | |
Graphic display of traces | ✓ | ||
Trace analysis | ✓ | ||
Power Meter Options | ✓ | ||
Data Storage | ✓ | ||
Data Transfer to PC or Cloud | ✓ | ||
Cost | Low |
Low-Medium |
High |
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