1. RITEC MEDARS MULTIPLE EMAT DRIVER AND RECEIVER SYSTEM Your Logo Here Drive Phased Arrays of EMATs at high powers

2. MEDARS Overview Drive up to 8 Electromagnetic Acoustic Transducers (EMATs) with precise control of phasing between transmitters Very High Power (up to 10 KW) Unique Bipolar Square Wave Pulse Low Noise Broadband Receiver Adjust phase delay with sub nanosecond resolution

3. MEDARS Overview

4. MEDARS Features & Benefits Unique Bipolar Square Wave Burst

5. MEDARS Features & Benefits Precise control of Phasing and delays between transmitter pulses

6. MEDARS Features & Benefits Adjust phase delays for constructive interference between transmitters improves signal-to-noise adjust for beam focusing or direction control

7. MEDARS Features & Benefits

8. High Efficiency, Low Output Impedance

9. MEDARS Features & Benefits Generate High Currents in EMAT

10. MEDARS Applications Provides high power outputs (~9KW) into impedance matched EMATs Efficient transmitter allows smaller size and permits up to 8 transmitters and receivers in a single instrument Ideal for industrial applications such as flaw detection, weld evaluation

11. MEDARS Applications Ideal for industrial applications such as flaw detection, weld evaluation EMAT Arra y 1mm hole 30 cm

12. MEDARS Transmitter Specifications Frequency Range: 250 kHz to 5 MHz Output Amplitude: 0 V to 800 V peak to peak into 50 Ohms with 12 bit range of adjustment; 440 V peak to peak into 5 Ohm load. High Power: up to 9.7 KW into 5 Ohms Burst Width: adjustable to 250 cycles Independent control of pulse amplitude and delay for 8 transmitters

13. MEDARS Receiver Specifications Up to eight high Gain (95 dB) broadband receivers with low noise preamplifiers Two receiver inputs for through transmission and pulse/echo with a single EMAT Adjustable high pass and low pass filters Frequency range: 250 kHz to 5 MHz Output linear to 2V peak to peak Multiplexed and summed outputs available