It includes MTA100 19-inch rack-mountable chassis, MTA150 controller cassette, and one MTA300 attenuator cassette. FC/PC fiber connector.

Its feature is very similar to single-channel standalone product model HA9, except that there are a little difference in specification.

"MTA100 AC POWERED RACK-MOUNT SHELF Input voltage 100-240 V AC, 50-60 Hz Power consumption 80 VA maximum Dimensions W x H x D 48.3 x 8.9 x 49.7 cm 19 inch rack mounting 2U high, standard 19 inch (48.26 cm) width Weight approximately 16 kg Operating temperature 0 to 40 °C Storage temperature - 40 to 60 °C Humidity maximum 95 % up to 40 °C decreasing at 5 % per °C from 40 to 60 °C The JDS Uniphase attenuator shelf holds up to eight attenuators and one control cassette in a low profile 19 inch (48.26 cm) rack-mounting shelf.The shelves can be stacked to provide higher channel testing capacities, such as 16, 32, and 40 channels. With each MTA Cassette having its own address within the MTA Series Optical Attenuator Shelf, you have the flexibility to use the MTA Cassette in many combinations. This flexibility allows you to get the amount of functionality you need in smaller blocks, lowering your overall system costs. MTA300 ATTENUATOR CASSETTE Operating wavelength range 1200-1700 nm Fiber type 9/125 µm Attenuation range > 60 dB resolution 0.05 dB nominal repeatability1 ± 0.005 dB typical, ± 0.02 dB maximum change rate < 6 s, 0-60 dB accuracy ± 0.05 dB typical, ± 0.1 dB maximum Insertion loss2, 3 2.2 dB typical, ??2.5 dB maximum Return loss2, 3 > 60 dB typical, > 57 dB maximum Maximum optical input power 200 mW Recalibration period (recommended) 2 years Polarization dependent loss ??0.05 dB typical, ??0.10 dB maximum Polarization dependent loss at 1545-1565 nm ??0.03 dB typical, ??0.05 dB maximum Beam block isolation > 90 dB Beam block speed < 20 ms MTA150 CONTROL CASSETTE Local control front panel keypad and LCD display Remote control GPIB Command set SCPI compatible " .