Product Bulletin Manual Variable Optical Attenuators (VA4 Series) The JDS Uniphase manual variable optical attenuators are compact, portable instruments for field system testing as well as test and development in laboratory applications. They provide continuously variable attenuation range of up to 65 dB with calibration wavelengths of 830/1300 nm or 1300/1550 nm. Attenuation is set manually from the front panel at a 0.1 dB resolution. Unlike programmable attenuators, the attenuation level is maintained when the power is turned on or off. The attenuators use JDS Uniphase's ultra-linear attenuator prism and highly reliable microlens technology to produce accurate attenuation settings with low insertion loss and excellent return loss. The display features a large-scale LCD readout, and the unit is powered by a long-lasting 9 V lithium battery for handheld operation in the field. Input and output ports are equipped with rear panel-mounted connector bulkheads, and all major connector types as well as the optional universal connector adapter (UCA) are available. Key Features & Benefits * * * * * * * Precision attenuation Two calibration wavelengths Low insertion loss Return loss > 60 dB Very long battery life Portable for field use Optional universal connector adapter Applications * * * * Optical power control Receiver testing Field system testing Power meter linearity checks Manual Variable Optical Attenuators (VA4 Series) | 2 Specifications PARAMETER Attenuation range Maximum insertion loss 1, 2 single-mode (SM) multimode (MM), 50/125 m MM, other SM, analog Return loss 3 MM, 50/125 m Maximum optical input power Attenuation accuracy 2 Display resolution Repeatability 2 Polarization dependent loss 2 Recalibration period (recommended) Battery lifetime 4, 5, 6 Dimensions ( W x H x D) Weight Operating temperature Storage temperature Humidity 1. 2. 3. 4. 5. 6. 1300 / 1550 nm 830 / 1300 nm 65/60 dB 3.0 dB 3.2 dB 3.9 dB 50/40 dB 7.0 dB 4.2 dB 4.9 dB > 60 dB > 35 dB 200 mW 0.5 dB 0.1 dB 0.1 dB 0.1 dB 2 years > 6000 hours 11.5 x 6 x 12.5 cm 0.82 kg 0-50 C - 40-60 C maximum 95 % RH from 0-50 C Including 0.5 dB for each connector. Measured at 25 C using unpolarized light at either calibration wavelength. Excluding connectors. With continuous display use. A "Low Battery" message is displayed when battery replacement is required. 9 V lithium battery. Ordering Information Sample Order: VA47K+1ASU20 Indicate your requirements by selecting one option from each configuration table. Print the corresponding codes in the available boxes to form your part number. VA4 For more information on this or other products and their availability, contact your local JDS Uniphase sales representative or JDS Uniphase directly. JDS Uniphase Corporation 570 West Hunt Club Road Nepean (Ottawa), Ontario K2G 5W8 Canada +1 CODE FIBER T YPE ( m ) CODE CONNECTOR T YPE 1 CODE CARRY CASE 1 2 4 7 50/125 62.5/125 100/140 9/125 FP FA SC SU SP NC FC/HPC FC/APC SC/HPC SC/APC ST/HPC No connector 0 1 Without With CODE CALIBRATED WAVELENGTHS ( nm ) G K 830/1300 1300/1550 Tel 613 727-1303 Fax 613 727-8284 instruments@jdsuniphase.com www.jdsuniphase.com CODE CODE RETURN LOSS K A Low MM Analog (> 60 dB) SM 2 4 8 PORT T YPE ( ON FRONT ) Bulkheads Pigtails UCA bulkheads All information contained herein is believed to be accurate and is subject to change without notice. No responsibility is assumed for its use. JDS Uniphase Corporation, its subsidiaries and affiliates, or manufacturer, reserve the right to make changes, without notice, to product design, product components, and product manufacturing methods. Some specific combinations of options may not be available. Please contact JDS Uniphase for more information. (c)JDS Uniphase Corporation. All rights reserved. MKT-DS-0044 Rev. 500 01/03/01