Undersea Systems, Geophysical Equipment, Survey Sonar and ROV

Acoustic Modems

ATM-980 Surface Unit
Surface box to be used with an ATM-886 for buoy applications when the customer needs RF radio link and/or RS-422 conversion from the ATM-886.
Depth	Surface use only, not depth rated
Size	19.05 cm (7.5 in.) Length, 23.87 cm (9.4 in.) Width, 12.06 cm (4.75 in.) Height
Weight	1.36 kg (3 lbs)
Power	12-24 VDC
Frequencies	Low frequency (LF) 9-14 kHz, Mid frequency (MF) 16-21 kHz
Transducer	Omni directional (180° beam), Directional (60° beam)
Connection	Connector for cable to ATM-886 via RS-422, Connector for power and RS-232, Connector for RF (on RF model only)

Part Number	Description
C-270-194	ATM-980 No RF, Includes RS-422 converter
C-270-193	ATM-980 RF, Includes Freewave 900 MHz RF radio and RS-422 converter

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

Related Equipment
Click on the links below for equipment designed to work with this product group