A Teledyne Benthos Acoustic Modem Brochure Teledyne Benthos ATM-900 Series Acoustic Modems Proven Acoustic Communications The Teledyne Benthos ATM-900 Series Acoustic Telemetry Modems represent the next-generation in acoustic modem technology. The ATM-900 Series provides an extensive list of features and enhancements spanning well beyond basic underwater communication capabilities. With over twenty five years of A-Comms experience, and thousands of acoustic modems delivered worldwide, Teledyne Benthos is your established, proven leader in acoustic communications technology. PRODUCT FEATURES • Reliable, robust, proven long distance communications • Splashproof, ruggedized and portable • Flexible housing designs to fit virtually any deployment configuration, including glass instrument housing • Internal batteries or AC/DC power • Optional features such as high capacity data logging, in band acoustic recording, arbitrary waveform play, and dual serial port available • Serial port • Transducer options including omnidirectional and directional, both integral and remote versions • Modems can be used in conjunction with the Benthos positioning product line • Color Display / Speakers • Transducer and cable included • Communicates with all Benthos acoustic modems and releases • 25m to 200m cables available • 500 meter depth rated • 2000 meter depth rated • 6000 meter depth rated • Alkaline batteries, 378 W-HR optional • Alkaline batteries, 378 W-HR optional • Alkaline batteries, 588 W-HR optional • Ideal for AUV applications or mounted in customer supplied housing • Remote head optional • Remote head optional • Remote head optional A Member of Teledyne Marine

A Teledyne Benthos Acoustic Modem Brochure ATM-900 Series Acoustic Modems GENERAL SPECIFICATIONS ATM-900 Series Baud Rate Frequency Band 80 bits per second (bps) Frequency Hopped (FH) 140-2400 bits per second (bps) Multiple Frequency Shift Keying (MFSK) 2560 -15,360 bits per second (bps) Phase Shift Keying (PSK) Customer Specified: Processing Features Data redundancy, 1/2 rate convolutional coding Multipath guard period selection FH, MFSK, and PSK modulation schemes Deployment Length Up to 2 years 3-6 months typical with hourly transmissions Unlimited with external power supplied Data Storage...