![OTDR-3501 - Optical Time Domain Reflectometer - includes VFL 1mW, 3.5" LCD TFT, internal storage memory and USB connectivity OTDR-3501 - Optical Time Domain Reflectometer - includes VFL 1mW, 3.5" LCD TFT, internal storage memory and USB connectivity](https://cdn10.bigcommerce.com/s-km6dyefd/products/318/images/769/OTDR-3501-front-on__28763__69039.1600023794.1280.1280.jpg?c=2)
OTDR-3501 - Optical Time Domain Reflectometer - includes VFL 1mW, 3.5" LCD TFT, internal storage memory and USB connectivity
![D YEDEMC Optical Time Domain Reflectometer 1310/1550nm 32/30dB SM Optic Fiber OTDR Tester Built-in VFL OPM OLS Functionn Connector UPC with FC/UPC-FC/APC-SX: Amazon.com: Tools & Home Improvement D YEDEMC Optical Time Domain Reflectometer 1310/1550nm 32/30dB SM Optic Fiber OTDR Tester Built-in VFL OPM OLS Functionn Connector UPC with FC/UPC-FC/APC-SX: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/51vnoNsNQlL._AC_SY780_.jpg)
D YEDEMC Optical Time Domain Reflectometer 1310/1550nm 32/30dB SM Optic Fiber OTDR Tester Built-in VFL OPM OLS Functionn Connector UPC with FC/UPC-FC/APC-SX: Amazon.com: Tools & Home Improvement
![Plot of time domain reflectometer (TDR) waveform and first derivative... | Download Scientific Diagram Plot of time domain reflectometer (TDR) waveform and first derivative... | Download Scientific Diagram](https://www.researchgate.net/publication/266878451/figure/fig1/AS:295665495232516@1447503555894/Plot-of-time-domain-reflectometer-TDR-waveform-and-first-derivative-as-seen-on-a-TDR.png)
Plot of time domain reflectometer (TDR) waveform and first derivative... | Download Scientific Diagram
![OTDR-7001 - Optical Time Domain Reflectometer - includes Power Meter, Laser Source and VFL 1mW in one device, Ethernet, Bluetooth and USB connectivity, 7" LCD touchscreen OTDR-7001 - Optical Time Domain Reflectometer - includes Power Meter, Laser Source and VFL 1mW in one device, Ethernet, Bluetooth and USB connectivity, 7" LCD touchscreen](https://cdn11.bigcommerce.com/s-ud26lew7xv/images/stencil/1280x1280/products/2292/3172/OTDR-7001-front-on2__87561.1599957997.jpg?c=2?imbypass=on)