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Faster SS-OCT Options for 12-bit High-Speed Data Acquisition PCIe Card

Continuously Acquiring Up to 200 kHz A-Scan Rate While Maximizing Superior Image Resolution, Performance

Key Features:

-New swept source optical coherence tomography options now support up to 1 GS/s on the 12-bit high-speed data acquisition PCIe card

-Faster image acquisition up to 200 kHz A-scan rate, continuously

-Targeting applications in various non-invasive medical imaging

Our High-speed Digitizers Team introduces swept source optical coherence tomography (SS-OCT) application options running at 1 GS/s (-SS2) and 500 MS/s (-SS1). The new options, now available on the U5303A high-speed data acquisition PCIe card, enable OEMs to obtain faster image acquisition by increasing sampling rate and A-scan rate. This allows for non-invasive, high-speed medical imaging in various applications, including ophthalmology, dermatology, gastrointestinal endoscopy, intravascular imaging, oncology and angiography.

This real-time processing solution allows OEMs to develop their SS-OCT engine using the development environment provided, which includes a GUI and C++. Furthermore, the options support “up and down sweep” and “up-sweep only”, including improved trigger accuracy for targeting phase sensitive applications and a FFT phase readout.

The new options also ensure improved SFDR due to new x4 (-SS2) and new x2 (-SS1) oversampling interpolation and guarantee SS-OCT synchronization for A-scan and B-scan trigger, enabling better image clarity and quality. Moreover, swept source maximum analysis depth is independent of the k-clock frequency, allowing adjustment of the maximum depth range being done by changing sample rate. Differences between the k-clock and OCT optical path can be compensated electronically with a programmable delay of ±64 ns.

“These new SS-OCT options enables usage of a fast acquisition running up to 200 kHz scan rate,” said Daniel Aebischer, OEM Applications Project Manager for High-speed digitizers. “This capability is critical in some applications, such as cardiovascular when the blood stream has to be interrupted in order to take the measurement. Increasing speed is essential even in gastrointestinal, endoscopic applications when continuous acquisition is required to sustain the data flow.”

Both -SS2/-SS1 options are available on the U5303A, a compact dual-channel ADC card delivering high dynamic range and high effective number of bits (ENOB) for enhanced image quality. As part of the OEMs development tool environment, a dedicated OCT GUI with C++ API and Labview support are provided.

The real-time SS-OCT processing engine was developed using an FPGA. OEMs also can develop their own real-time processing engine. This gives way to re-usability from one ADC technology to another.

Our hardware allows OEM to see smaller and deeper by preserving the signal integrity and detecting the smallest signals, whilst our complete offering minimizes risks with ease of integration and reduces time-to-market.

 

High-Fidelity PCIe Digitizers: U5303A Option Enables Broad Set of RF, Wireless Measurements

Our High-Speed Digitizers Team announces availability of high-fidelity digitizer application option for its U5303A 12-bit PCIe® digitizer.

The new BB1 application option provides enhanced performance by: 

-compensating the analog-to-digital converter (ADC) and the front-end distortion

-minimizing the interleaves spurs

-reducing the overall noise bandwidth

This results in highly improved and uniform measurement fidelity across the useful bandwidth, which greatly benefits RF and wireless frequency domain measurements. The digitizer’s post processing compensation also delivers better spurious-free dynamic range (SFDR) and intermodulation product (IMx) specifications.  

This high-fidelity digitizer allows customers to select one of the five available settings that best fit their applications, from 1.6 GS/s with 650 MHz instantaneous bandwidth, down to 100 MS/s with 50 MHz instantaneous bandwidth. The achievable data acquisition length is up to 64 MSamples per channel.

“The BB1 option was developed for test applications that require higher dynamic range and excellent SFDR fidelity,” said Thierry Ortelli, Digitizers R&D manager. “Across the instantaneous bandwidth, high SFDR and linearity performance provide unique capabilities for testing radio frequency integrated circuit components.”

By adding processing capability within the driver, the U5303A ADC card option BB1, coupled with the data analysis software, enables a broad set of RF and wireless measurements, such as error vector magnitude and intermodulation distortion. 

Introduction of Continuous Acquisition Stream Capability for PCIe Digitizers

Our High-Speed Digitizers Team announces the introduction of continuous simultaneous acquisition and readout (CSR) for its U5303A 12-bit PCIe digitizer. In addition, complete data recording software applications are available, such as digitizer streaming (application option CB0) and digital down-converter streaming (application option CB1).

• CSR Continuous Simultaneous Acquisition and Readout

The U5303A ADC card option CSR allows engineers to perform acquisition and readout simultaneously and in a continuous way. They can use several mechanisms to adapt the acquisition data rate to the targeted application. A gapless acquisition can be sustained at a high data rate due to the PCIe Gen2 x 8 interface. An entire range of new application possibilities are enabled by the CSR option, which includes real time GPU-based data processing systems and data recording systems.

• CB0 Digitizer Streaming

CB0 is an application option which implements a real time digitizer data recorder. Based on the CSR architecture, the CB0 provides a command line interface and an easy to use data viewer. Recording performance up to 1 GB/s are ensured in a specific qualified system.

• CB1 Digital Down-Converter Streaming

CB1 provides the same functionality as CB0 and adds real time digital down-converter functionality. Recording performance up to 180 MHz instantaneous bandwidth are ensured in a specific qualified system. “Numerous test scenarios require gap-free or continuous acquisition of digitized data for minutes, hours or days.” said Giovanni Lucia,  R&D Engineer for hardware and firmware. “Signal monitoring, software defined radio, atmospheric research, telemetry systems and medical imaging are examples of such applications. We designed the CSR option with the intent of providing an easy and effective implementation to simplify the integration in any OEM system. Furthermore, the CB0 and CB1 applications provide a reliable and cost effective data recording system for customers who want a ready to use solution.”

12-bit High-Speed PCIe ADC Card Available with Optical Coherence Tomography Technology

Our High-Speed Digitizers Team announces that the U5303A high-speed data acquisition 12-bit PCIe® card, in collaboration with YellowSys, a provider of IP processing firmware and software is now available with an option dedicated to the optical coherence tomography (OCT) technology.