9/125um SMF with 2 FC/PC adapters on front panel. 50dB max attenuation. The user manual in last pdf link below is for similar model HA9, but we very believe it also works for this HA2 model. General Description: The JDS Uniphase Programmable Attenuator is a high resolution, extended-range, programmable attenuator ideal for testing power meters and for general test and laboratory work. The attenuator has a nominal resolution of 0.01 dB (0.001 dB for the HA1 series) and an extended attenuation range of 100 dB. The standard operating wavelength is 1200-1700 nm (750-1700 nm is available to use with a reduced attenuation range of 60 dB for the HA9W attenuator). The HA1 attenuator is a single-mode, ultra-high resolution, and programmable attenuator ideal for bit error rate testing and general laboratory work. The new JDS Uniphase HA2 Programmable Attenuator provides a wavelength dependence of ± 0.05 dB and input power up to 1 W (30 dBm). The HA2 is suitable for a variety of applications including amplifier testing and DWDM system characterization. HA attenuators are ideal for use in such demanding applications as multichannel AM systems and high bit-rate digital pulse code modulation (PCM) systems. Discrete internal optical reflections are minimized to better than 60 dB, and cavity effects are virtually eliminated. All HA attenuators are offered with high return loss and low spectral ripple for CATV AM systems. The inherently linear design of these attenuators, combined with built-in calibration and offset functions, allows the user to match the display to an optical power meter over a wide power range. This feature is useful in tests requiring control of the absolute optical power source for the test device. The built-in beam blocking switch provides fast access from any attenuation setting to infinite attenuation (> 90 dB). Key Features 100 dB range 0.01 or 0.001 dB resolution 0.01 dB repeatability Accuracy of ± 0.1 dB Typical polarization dependent loss (PDL) of 0.03 dB 1200-1700 nm or 750-1700 nm wavelength ranges Built-in beam block switch GPIB and RS232 remote control Single-mode or multimode fiber SCPI compatible command set Optional couplers or switches Optional universal connector adapter High power input of 1000 mW Wavelength dependence of less than ± 0.05 dB over 1530-1625 nm range Complies to CE requirements plus UL3101-1 and CAN/CSA-C22.2 No. 1010.1 Applications Precise optical power control Power meter linearity calibration Analog transmission tests Bit error rate tests Loss simulation in fiberoptic links EDFA output power characterization