AH Series – Preamplifiers and accessories for Onda hydrophones
The Onda AH-Series includes low-noise preamplifiers and accessories for reliable signal conditioning in precise hydrophone measurements. The preamplifiers are electronically and mechanically matched to Onda hydrophones, combining a wide frequency range with low self-noise and high stability.
With various amplifier configurations as well as attenuators, adapters, cables, and brackets, the measurement chain can be specifically adapted to the respective ultrasonic application.
Broadband signal conditioning up to 100 MHz
The preamplifiers AH-2010 and AH-2020 offer a frequency range of 50 kHz to 100 MHz and are therefore suitable for broadband ultrasonic measurements.
A flat frequency response and low self-noise enable reliable transmission of the signals generated by the hydrophone. The output impedance is 50 Ω, allowing direct connection to typical oscilloscopes and measuring instruments.
AH-2010 and AH-2020
The AH-2010 operates with a fixed voltage gain of 20 dB and offers a simple solution for measurement tasks with constant signal amplification requirements.
The AH-2020 expands this concept with a switchable gain of 0 or 20 dB. Switching can be done manually or via a TTL signal. This allows the preamplifier to be flexibly adapted to different signal levels within a measurement setup.
Submersible design for compact measurement setups
The AH preamplifiers are fully submersible and can be connected to the hydrophone directly inside the water tank. As a result, the first amplifier stage is located close to the sensor, and only a coaxial cable needs to be routed out of the tank to the measuring device.
The waterproof connection to Onda hydrophones enables compact and low-noise measurement setups, particularly in automated hydrophone scanning systems.
Accessories for the complete hydrophone measurement chain
In addition to the preamplifiers, Onda offers comprehensive accessories for configuring the measurement chain. These include, among others Attenuators, adapters, coaxial cables, and hydrophone mounts.
The ATH-2000 Attenuator can be used, for example, to extend the usable dynamic range of the measurement chain and prevent overloading of the preamplifier at high signal levels.
calibrated measuring chain
The preamplifiers can be calibrated together with the hydrophone used. This is particularly relevant for high-frequency measurements: Onda points out that above 20 MHz a calibration of the hydrophone together with the preamplifier actually used is required, since cable and impedance effects are having an increasing influence on the measurement.
This allows the entire signal chain comprising the hydrophone, preamplifier, and cabling to be specifically configured for quantitative ultrasonic measurements.
Typical applications
- Hydrophone measurements in water tanks
- Characterization of ultrasonic fields
- Medical ultrasound technology
- Development and testing of ultrasonic transducers
- Automated hydrophone scanning systems
- broadband ultrasonic measurements
- Research and Development
- Quality assurance and calibration
Benefits of the AH series
- Frequency range from 50 kHz to 100 MHz
- Low self-noise
- Flat frequency response
- Fully submersible design
- Waterproof connection to Onda hydrophones
- AH-2010 with 20 dB gain
- AH-2020 with switchable 0/20 dB
- Just one cable from the water tank
- Calibration available
- Extensive accessories for complete measuring chains
Preamplifiers and accessories from Onda
The AH Series and the matching Onda accessories enable the setup of a matched measurement chain from the hydrophone to the measuring instrument. Various preamplifiers, attenuators, adapters, and cables allow adaptation to different signal levels, frequency ranges, and measurement geometries.
Soliton assists you in selecting and configuring hydrophones, preamplifiers, cabling, and other accessories for your ultrasonic measurement.
