OP960 Series | Optical Return Loss and Insertion Loss Meters

OP960 Series | Optical Return Loss and Insertion Loss Meters

The Industry’s Fastest & Most Accurate Optical Return Loss Meters

OP960 Series Single & MultiChannel Optical Return Loss Meters


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OptoTest’s new OP960 Series Optical Insertion Loss and Optical Return Loss Meters build on the well proven capabilities of the fastest RL meters in the industry, the OP940 Series, with increased speed and enhancements that make them even easier to use. A larger and sharper touchscreen, built-in Ethernet capability, and upgraded cases and components make the OP960 the preferred choice for fiber optic cable manufacturers looking for a complete, simple, and accurate testing solution with a small footprint.


Faster Return Loss & Insertion Loss Testing Speeds

A measurement time of two seconds per channel, using the front panel in Dual Insertion Loss & Return Loss mode or via software, is over 30% faster than the previous industry leader, the OP940 Optical Return Loss Meters. Testing 24 fiber MPO using the OP960 in the same mode yields a 24 second savings compared to the OP940.

Simple and Touch-Free Return Loss Measurements

The OP960 Optical Return Loss Meter performs return loss measurements without mandrel wraps or index matching gel for quicker tests with fewer manual operations.

Bigger and Sharper Touchscreen

The OP960 touchscreen has 35% more area and 70% more pixels than the OP940 for improved ease of use. Simple front panel controls are easy to navigate without sacrificing functionality. IL and RL can be tested simultaneously with results updating in real time. Help menus are readily accessible on every screen to guide you through the features and options.

Built-in Ethernet Capability

Remote operation is now possible when you design a custom testing solution via OPL-SDK.

Upgraded Cases and Components

The OP960 is designed with durability in mind and housed in a new case that is sturdier than ever, making it possible to stack equipment on top. Improved components and circuitry increase reliability and extend service life long into the future.


We proudly design & manufacture our equipment in California, United States.


Manufacturing Testing
R&D Testing

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Automate, customize, and record your tests through software.

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Can be calibrated on-site, in-house or remotely.

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OptoTest offers a three-year full warranty!

Technical Support

Our team of experts is ready to assist you.

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Our 30-Day Guarantee allows a full refund for any reason.
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Talk to one of our sales engineers at +1(805) 987-1700 to learn more about our custom solutions.


Return Loss Single Mode
Source Wavelength 1310nm, 1550nm
Measurement Range
-10dB to -80dB
Measurement Linearity ±1dB (-12dB to -72dB)
Distance Range up to 2500 meters
Mandrel-free minimum distance 1.7 meters (both reflections <-45dB)
Insertion Loss Single Mode
Source Center Wavelength ±30nm from nominal
Source Bandwidth <10nm
Internal Fiber 9/125μm (SMF28)
Launch Condition N/A
Output Power* (typical) -1.5dBm
Insertion Loss Stability** ±0.02dB

Measurement Linearity (Relative Accuracy)***
Deviation ± 0.05dB 0dBm to -65dBm at 1490nm
Deviation ± 0.01dB <10dB power variation

*For single channel systems. **Over 1 hour with a max. change of 1ºC. ***For 1, 2, and 3mm detectors.

Measurement Timing Single Mode
IL and RL, Dual Wavelength 3s*
Switching Time (Multichannel) 100ms

* Using the front panel in Dual ILRL mode or running OPL-Pro with real-time update enabled.

Mainframe OP960
Dimensions 8.5” x 3.5” x 13″
Power Supply 90VAC … 264VAC; 47Hz to 63Hz; Output: 18V 5AV
Warm-up time 5-15 minutes
Operating Temperature 5℃ to 50℃
Maximum Relative humidity* 95%

* For temperatures up to 31°C, decreasing linearly to 50% relative humidity at 40°C.
Laser Classifications

All OP960 Insertion Loss and Return Loss Test Sets utilize a Class I Laser Source. Unless otherwise noted, all OP250, OP715, and OP750 source units with internal laser sources utilize a Class I Laser Source. Unless otherwise noted, all OP815 and OP850 Insertion Loss Test Sets with internal laser
sources utilize a Class I Laser source. All OP280 Visual Fault Finder units utilize a Class III Laser Source.

OptoTest strongly suggests that all necessary precautions be taken whenever any Class I or Class III laser source is used.

Specifications are subject to change, please confirm specific performance characteristics of the product at the time of ordering. All specifications are valid within temperature range of 18ºC to 24ºC unless otherwise noted. For additional specifications please contact OptoTest.


Advancing the World of Fiber Optics™