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New AXIe and PXIe High-Speed Digitizers Blog Platform for T&M Applications

Network with Robin Hassell at Photonics West 2017, San Francisco, California, USA, 28 January – 2 February

Robin Hassell, Business Manager for Keysight High-Speed Digitizer Technology will introduce you to the latest developments on Swept-Source (SS-OCT) application options and PCIe digitizers.

For more information about the exhibition: http://spie.org/conferences-and-exhibitions/photonics-west

Robin Hassell’s contact details: +1 (940) 602 0860 e.mail: robin_hassell@keysight.com

 

Unrivaled 10 GS/s AXIe High-Speed Digitizer Providing High Dynamic Range with Wide Bandwidth

Multi-Module Capability Ensures Very High Channel Density

Key Features:

-New AXIe high-speed digitizer with up to 10 GS/s sampling rate

-4 channels, 10-bit, DC up to 2.5 GHz bandwidth

-Multi-channel applications in advanced physics experiments, and aerospace & defense

Keysight High-Speed Digitizers Team announces the new M9710A 10-bit AXIe high-speed digitizer running at 10 GS/s. With high dynamic range across a wide 2.5 GHz bandwidth, this digitizer is ideal for multi-channel applications in advanced physics experiments, and aerospace & defense.

The new M9710A AXIe module features up to 4 DC-Coupled input channels, a very high sampling rate up to 10 GS/s and a long on-board acquisition memory up to 8 GB in a compact single-slot AXIe form factor.

This new module includes proprietary ICs developed by Keysight. In particular, the LDNA front-end amplifier IC provides single ended to differential outputs to the interleaved ADC. The resulting channel performance in interleaved ADC mode remains unaltered thanks to a low noise architecture and distortion contribution, which is 15 dB lower than the ADC specification.

Build Multi-Channels Data Acquisition Systems

Based on the modular AXIe architecture, the M9710A high-speed DAQ is scalable and extensible to provide a fully operational multichannel system on a compact format. It combines high channel density, measurement fidelity and high throughput to build acquisition systems with high channel count and fast, accurate measurements in a compact form factor. The architecture provides a fully operational system, with an offer of 2-, 5- and 14-slot AXIe chassis.

For instance, up to thirteen M9710A high-speed digitizers can be inserted in the M9514A 14-slot chassis providing a 52 channels 10-bit system.

“With its new design and outstanding performance, such as flat SFDR over a large analysis bandwidth combined with minimum overshoot on fast pulse and exceptional low noise input level, the M9710A targets time and frequency domain applications” said Pierre-François Maistre, High-Speed Digitizers Project Manager, Keysight R&D Digital & Photonics Centre of Excellence. “With its new proprietary ICs, it provides better measurement fidelity at higher sampling rate over larger bandwidth”.

AXIe is an open system, and users can choose between 8-, 10-, and 12-bit high-speed digitizers’ resolution and mix and match modules and chassis.

Moreover, multichannel acquisition software AcqirisMAQS, designed specifically for large multichannel acquisition enables configuration management as well as visualization of data for hundreds of channels from a single console.

Additional information about product configuration and pricing is available at www.keysight.com/find/M9710A.

Streaming and Recording Application Options for U5303A, M9703B and M9203A High-Speed Digitizers: An Example (2/2)

In the following example, we capture 2 channels simultaneously at 1 GS/s with signal at 1.8 GHz center frequency  and 200 MHz IBW  

Sampling and compliancy with Nyquist zones

– The IBW is in 4th Nyquist band (between 1.5 GHz and 2 GHz) and doesn’t cross over between Nyquist zones

– For signal in 4th Nyquist band, sampling at 1 GHz Fs  causes an aliased signal in negative frequency domain . This aliased signal is then down-converted in baseband

Filtering requirements

– It is recommended to add a pass-band filter at the digitizer input, selecting the signal IBW (1.7 GHz to 1.9 GHz)

Local Oscillator

– For down conversion, LO would be set at signal center frequency 1.8 GHz  (physically the signal is aliased at -200 MHz, thus LO is at -200MHz).

IBW and data rate

– The signal 200 MHz IBW  requires to select higher decimated sampling rate 250 MS/s, resulting in a 1000 MB/s data rate

Multi-channel streaming

– Using U5303A-CB1: a single digitizer can manage the 2 channels simultaneously since streaming limit is 2.4 GB/s

– Using M9703B-CB1: streaming limit is 1.5 GB/s, thus there are two solutions to stream 2 channels simultaneously

   – either use two digitizers

   – or a single digitizer with 12-bit mode: this case results in two channels at 700 MB/s per channel with resolution: I – 12 bits, Q – 12 bits

To learn more about Keysight Application Options, please contact us at digitizers@keysight.com.

 

 

Acquiring Data for Event Reconstruction and Analysis

Your test goal is to quickly capture many different signals generated from an event and re-construct the data for review and analysis. Timing and synchronization of the signals must be perfectly aligned in order to properly reconstruct the original event. Some signals may require further processing or conversion such as those acquired through transducers. How do you ensure test results are accurately captured? The challenges of complex high-speed multichannel acquisition systems are discussed further in this article.

Test system challenges
When collecting large amounts of data to reconstruct real-time and fast transient or single-shot events engineers face several test challenges. Selecting the best instruments to construct a reliable test system for data collection is most important. Capturing multiple real-time signals generated during the event requires a high-speed digitizer that can make many very fast, accurate measurements. The performance of the digitizer determines the quality of the signal measurements, with accurate triggering and timing across all the channels to ensure reliable reconstruction of the acquired data. Channel synchronization can become an even greater challenge as the number of monitored signals grows, requiring a complex multi-channel test system configuration.
Various transducers, detectors or instruments such as photomultiplier tubes (PMT), beam current transformers, spectrometers, or fast diodes may be used to capture energies that contribute to the reconstruction of the actual event. Measurements and reliable conversions are needed to accurately calculate the true energy source measured by transducers.
Other considerations include software, space and power. Software provides system control, measurement conversions, data storage management and signal analysis. Accommodating a small test area and limited power can be managed by selecting a digitizer in a format that offers flexibility for high channel count, power management and a smaller footprint such as PXI or AXIe.

Solution
A combined AXIe hardware and software solution offered by Keysight Technologies includes the AXIe M9703B and M9709A digitizers with the U1092A-S0x Acqiris MAQS multichannel acquisition software. The M9703B and M9709A digitizers provide 8 channels with 12-bit resolution or 32 channels with 8-bit resolution, respectively and enable synchronized channels across AXIe chassis for systems with up to 96 channels. On-board FPGA, consisting of four Virtex-6 FPGA, provides real-time processing for data reduction. The flexible AXIe configuration includes a chassis and controller with triggering and clock options for channel synchronization. Very fast data capture with measurement fidelity at GHz speed ensures crucial data is capture. Low noise and high dynamic range of the analog-to-digital conversion instill confidence in the acquired results for detailed event analysis.

An ideal test system for this application would provide accurate data capture, many fast reliable measurements, synchronized channels, precision triggering, system control, fit into a specific test area and be within power limits while achieving extreme speed and precision measurements.

For more information on the AXIe digitizers and use for large physics experiments click here: http://literature.cdn.keysight.com/litweb/pdf/5991-0063EN.pdf

For more information about Keysight High-Speed Digitizers, please contact us at digitizers@keysight.com.

 

 

 

Frequency Analysis Measurements with the New 10-bit PCIe Digitizer

Up to 10 GS/s and more than 2 GHz Instantaneous Bandwidth per Channel

Key Features:

-One channel at 10 GS/s or two channels at 5 GS/s, DC up to 2.5 GHz bandwidth

-Dual full scale range 250 mV and 1 V

-Low noise density, low distortion and optimized frequency response flatness

 

Keysight High-Speed Digitizers Team announces capability of more than 2 GHz instantaneous bandwidth on the U5310A 10-bit PCIe high-speed digitizer.

This unique ADC card is designed for frequency analysis such as wireless, telecommunication and spectroscopy applications.

The new U5310A high-speed digitizer features one channel at 10 GS/s or two channels at 5 GS/s, DC up to 2.5 GHz bandwidth and dual full scale range at 250 mV and 1 V.

We developed proprietary ICs for the U5310A. In particular, low noise and low distortion signal conditioning amplifier to drive interleaved ADCs and specific clock distribution to minimize the clock jitter and spurious. Moreover, optimized frequency response flatness provides enhanced measurement accuracy.

“With those proprietary technologies, Keysight provides the unique solution to interleave DC coupled 10-bit ADCs without adding distortion while providing low full scale and wide bandwidth input” said Daniel Frund, Analog and IC Design Manager, Keysight’s Digital and Photonics Center of Excellence.”

Here below some examples of frequency analysis measurements:

1) Frequency response (nominal) to a 100 MHz single tone input signal at -1 dBFS, acquired at 5 GS/s, without equalization, and using 1V FSR.

U5310A-Frequency-Response-100 MHz-single tone input signal

 

2) Frequency response (nominal) to a 1.9 GHz single tone input signal at -1dBFS, acquired at 5 GS/s, without equalization, and using 1V FSR.

U5310A-Frequency response-1.9-GHz-single-tone-input-signal-at -1dBFS

 

3) Frequency response (nominal) to a 1.9 GHz single tone input signal at -1dBFS, acquired at 10 GS/s, without equalization, and using 1V FSR.

U5310A-Frequency-response-1.9-GHz-single-tone-input-signal

For more information about Keysight High-Speed Digitizers, please contact us at digitizers@keysight.com.