The Submersible Preamplifier is an essential part of the hydrophone signal as it buffers the signal and provides a 50 Ohm source. It connects either directly to an Interchangeable Probe (‘HP’ series), or, if required, via a 20dB In-Line Attenuator (A20/1).



HP Series Submersible Preamplifier

Power is provided by the DC Coupler (DCPS) so that the dc power and the acoustic signal share the same conductors in the interconnecting coaxial cable between the preamplifier and the coupler.

Preamplifier measurements

Technical Specification

Output Impedance: 50 Ohms
Voltage Gain: Nominal 8dB at 3.5MHzBandwidth:10kHz to 50MHz (-3dB) 5kHz to 100MHz (-6dB)
Maximum Output Level: 700mV pk – pk into 50Ω load
Input Impedance: 1MΩ in parallel with 8pF
Output Noise: Typically 60uV rms (100MHz bandwidth)VSWR: 1-1.4 over the range 0.3-130MHz
Terminations: Input – MCX Output – SMC
Power Requirements: 24v from the DCPS
Operating Range: Temperature 0 to 50°C
Weight: 50g

* Precision Acoustics reserves the right to change the specification without notice.

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