Joinwit JW3303 handhold optical variable attenuator is used for continuously variable optical signal attenuation. As the attenuator is used in the laser system for the on-line testing, there, thereforeJW3303 can be used in the digital system of communication devices (such as: PHD, SDH) and also in the system of adopting analog modulation (CATV).

Application
• Telecom maintenance
• CATV maintenance
• Comprehensive cable construction system
• Optical instruments research and development
• Optical communication education and lab testing
• Other optical project

Features
• Stepwise attenuating by circumgyrated dial: attenuating step 0.05dB
• Provide with the function of displaying dB and dBm attenuating value
• Alternative function of 10 minutes Auto-off without operation
• After off the instruments, the system will have the memorizing of the attenuating value and the attenuating step, in order to restore the system back to the previous shut down state when open the instruments next time

Specifications:

Type	JW3303
Attenuating wavelength Range	1260~1650nm
Fiber Model	9/125um SM
Optical Connector	FC/PC
Calibrated wavelengths	1310/1490/1550/1625
Measurement Range	2.5~60dB
Resolution	0.05dB
Minimize Insertion Loss	<2.5dB
Linearity	±0.5dB
Repeating	±0.2dB
Attenuating Accuracy	±0.8dB
Back Reflection	≈35dB(typical value40dB)
Max input	∠20dBm
Displaying type	lattice 128*64 black and white, white back ground light
Rechargeable batteries	7.4V
Power supply adaptor	7~8.5V
Operation temperature	0~40℃
Storage temperature	-10~60℃
humidity	0~85% (non-condensation)
Weight	450g