Undersea Systems, Geophysical Equipment, Survey Sonar and ROV

Acoustic Modems

ATM-887

Depth	6000 m (19,680 ft)
Size	12.7 cm (5.0 in.) Diameter x 85.3 cm (33.6 in.) Length
Weight	16.4 kg (36 lbs) dry, 7.7 kg (17 lbs) wet
Power	588 W•Hr internal batteries (can also be powered by external source)
Frequencies	Low frequency (LF) 9-14 kHz, Mid frequency (MF) 16-21 kHz
Transducer	Omni directional (180° beam), Directional (60° beam)
Connection	MBH-9-MP connector on unit, 9 pin RS-232 cable included

Part Number	Description
013447........................	ATM-887 LF Omni
013448........................	ATM-887 MF Omni
Call for availability.....	ATM-887 LF Directional
013686........................	ATM-887 MF Directional

General Specifications

Baud Rate	140-15,360 bps
Bit Error Rate	Better than 10-7 with high SNR
Data Storage	704 Kbyte Data logger standard
Processing	Data redundancy, 1/2 rate convolutional coding mulitpath guard period selection MFSK and PSK modulation schemes
Distances/Range	2-6 km common, greater distances possible, 20+ km available using repeater functionality

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