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FF-3303 Optical Variable Attenuator OVA Digital Optical Fiber Attenuator

SKU: 1510071858

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FirstFiber Optical Variable Attenuator


Model: FF-3303             Wavelength: 1310/1490/1550/1625nm 

Resolution: 0.05dB       Attenuation Range: 2.5dB to 60dB 

* NOTE: The attenuator is acturely number 1 in the world, because of special & new
technology applied. Adopted by Top 500 companies.



1) With FC SC ST Connectors

2) With Calibrate Certificate & Test Report

3) With Easy Carrying Bag

4) With Small Cleaning Tools



1) 8:00am~11:30pm (UTC+8) Online/Call Q & A

2) Multi-Language User Manual

3) Technical Question and Answers

4) Join our Fiber Optic Instruments Training Class

5) 18 month warranty

6) Remote Video Demo


Wechat/ Whatsapp: +86 1821774005

Skype ID: anker.yang88


FF-3303 handheld optical variable attenuator is used for continuously variable optical signal attenuation. Attenuator is used in the laser system for online testing, therefore, FF-3303 can be used in the digital system of communication devices (such as PHD, SDH) and also in the system of adopting analog modulation(CATV)


- stepwise attenuating by circumgyrated dial: attenuating step 0.05dB

- Provide with function of displaying dB and dBm attenuating value

- 10 minutes Auto-off function can be activate and deactivate with keypad operation

- After instruments off, the system will have the memorizing of the value and the attenuating step, in order to restore the system back to the previous shut down state when open the instruments next time

- Portable, rugged, lightweight; Easy to use.


Model# FF-3303
Fiber Model 9/125um SM
Optical Connector FC/SC/ST
Calibrated wavelengths 1310/1490/1550/1625nm
Measurement Range 2.5~60dB
Resolution 0.05dB
Min Insertion Loss <2.0dB
Linearity ±0.5dB
Repeating ±0.2dB
Attenuating Accuracy ±0.8dB
Return Loss at Input/ Output >35dB(typical value 40dB)
Max input 20dBm
Displaying type lattice 128*64 black and white, white back ground light
Rechargeable batteries 8.4V
Power supply adaptor 8.4V
Operation temperature 0~40℃
Operation Time 40 hours
Storage temperature -10~60℃
humidity 0~85%(non- condensation)
Dimensions 180X90X36.5
Weight 427g

FF-3303 Optical Variable Attenuator OVA

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Warranty Service:
FirstFiber warrants to the purchaser that our products shall be free from defects in material and workmanship under normal use (consumables, normal tear and wear excluded) for a period of one year from the date of shipment. Any part which is determined by FirstFiber to be defective in material or workmanship shall be returned to FirstFiber or authorized service location, as FirstFiber designates and shipping costs prepaid. Defective items will be repaired or replaced at FirstFiber's option.



The certificate shows that a component/subsystem can be used in a specific application according to a requirement class (RC) or a integrity level (SIL). The system integrator and end user must always be aware of how to use certified components/subsystems in safety-related function, respectively a safety instrumented system. Because of the many different possibilities and how to configure a safety system, the end user must get the related information from the manufacturer of the certified component/subsystem.



The CE marking is a mandatory European marking for certain product groups to indicate conformity with the essential health and safety requirements set out in European. To permit the use of a CE mark on a product, proof that the item meets the relevant requirements must be documented.



Working in partnership with the policy lead at BERR (The Department for Business, Enterprise & Regulatory Reform), NWML is the UK Enforcement Authority for the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2008 (the “RoHS Regulations”). Manufacturers need to understand the requirements of the RoHS Directive to ensure that their products, and their components, comply.



The Federal Communications Commission (FCC) is an independent United States government agency. The FCC was established by the Communications Act of 1934 and is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. The FCC's jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions.