The RPA11 is a Remote Pre-Amplifier that is controlled over the Ethernet interface through the NetBurner Coldfire microprocessor. The RPA11 can be configured for up to two channels of ultrasonic (UT) amplification. Each channel can have one of the following:

0–40 dB variable gain linear amplifier
0–40 dB linear gain + 80 dB logarithmic amplifier
120 dB programmable attenuator used for setup and calibration