The JDS Uniphase Programmable Attenuator is a highresolution, 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 HA2 series 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 & Benefits
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
GPIB and RS232 remote control
Single-mode or multimode fiber
SCPI compatible command set
Optional couplers or switches
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
Precise optical power control
Power meter linearity calibration
Analog transmission tests
Bit error rate tests
Loss simulation in fiberoptic links
EDFA output power characterization
Front panel access provides the option of increasing functionality through the addition of other devices, such as couplers or switches. The 5 V driver key on the front panel (connected to the 5 V driver on the back) acts as a toggle for an external or internal (if installed) switch.
The HA9 and HA1 attenuators can be fitted with 10/90 or 50/50 couplers. Optional built-in couplers or switches provide an output tap or access to two inputs or outputs. Both models have a SCPI/HP8156A compatible command set and can be controlled from the front panel keyboard or by the GPIB or RS232 interfaces.