Spectrum Instrumentation Unveils High-Speed Multichannel AWGs

Spectrum Instrumentation has expanded its generatorNetbox portfolio with the introduction of the DN6.63x, a new line of arbitrary waveform generators (AWGs) designed for high-frequency and high-channel-count applications. 

The new instruments utilize high-speed 16-bit digital-to-analog converters (DACs) to deliver signal generation capabilities ranging from DC to 2.5 GHz. The series includes variants offering up to six channels operating at 10 GS/s output speed or 12 channels at 5 GS/s output speed.

Spectrum Instrumentation has expanded its generatorNetbox series with the DN6.63x AWGs. Image used courtesy of Spectrum Instrumentation

DN6.63x Arbitrary Waveform Generators (AWGs)

Spectrum Instrumentation has built the DN6.63x AWGs around a platform that prioritizes signal fidelity and synchronization. Each channel is driven by its own dedicated DAC, all of which are synchronized via a phase-locked loop system. This architecture allows the instruments to maintain precise phase alignment across all active channels, a critical requirement for multi-signal test setups such as MIMO communications or beamforming.

The AWG’s 16-bit resolution provides a significant dynamic range advantage over standard 12-bit or 14-bit generators often found in this frequency class. According to Spectrum Instrumentation, the devices achieve a signal-to-noise ratio of up to 64 dB, a spurious-free dynamic range of -90 dB, and a noise spectral density of -150 dBm/Hz.

The output stage is designed to drive varying loads, supporting both single-ended and differential operation. Into 50 Ω loads, the AWGs can generate signals with amplitudes up to 1 Vpp. For high-impedance loads, the output swing increases to 2 Vpp.

A look at Spectrum Instrumentation’s generatorNetbox AWG product portfolio. Video used courtesy of Spectrum Instrumentation

Direct Digital Synthesis and Pulse Generation

Beyond standard waveform playback, the DN6.63x series supports optional firmware features for specific signal generation tasks. A direct digital synthesis option allows users to generate multiple sine waves simultaneously on a single carrier. This feature supports up to 64 individual sine waves per channel, totaling 384 sine waves on a fully populated six-channel unit. Each sine wave component can be independently adjusted for frequency, amplitude, and phase with a timing step resolution of 3.2 ns.

Additionally, a digital pulse generator option is available. This feature utilizes the front-panel multi-purpose I/O connectors to output digital pulses. It allows for the programming of independent pulse generators with user-defined loops, duty cycles, frequencies, and delay parameters, useful for system timing and triggering applications.

Connectivity and System Integration

The DN6.63x instruments are part of the generatorNetbox family, which utilizes an LXI-compliant Ethernet interface. This allows the AWGs to be integrated into local networks and controlled remotely from a PC or workstation. The chassis is a standalone unit, distinct from card-based PXIe or PCIe form factors, making it suitable for benchtop use or mobile testing where a dedicated chassis is not available.

The instruments come equipped with up to 48 Gigasamples of internal memory. Playback modes include Single-Shot, Loop, FIFO, Single Restart, and Multiple Replay, providing flexibility for generating long, non-repetitive signal sequences or complex repeating patterns.

Spectrum Instrumentation has designed its generatorNetbox products for intuitive, out-of-the-box use, simply requiring users to download the Spectrum software before use. Image used courtesy of Spectrum Instrumentation

User Interface and Software Support

The DN6.63x’s hardware is supported by SBench 6, Spectrum Instrumentation’s proprietary interface for instrument control, waveform creation, and data analysis. SBench 6 includes the “EasyGenerator” function for creating standard signals and supports importing data from oscilloscopes or external files (ASCII, binary, WAV). For automated test systems and custom integration, the DN6.63x series supports a variety of programming languages. Drivers and examples are provided for Python, C++, MATLAB, LabVIEW, and other standard development environments on both Windows and Linux operating systems.

Designed for Demanding Test Applications

The DN6.63x series represents an addition to high-performance arbitrary waveform generation, offering a high channel density solution by integrating up to 12 synchronized channels with 16-bit resolution into a single, Ethernet-connected instrument. The devices are particularly suited for complex test environments requiring multiple, highly synchronized signals, with applications spanning quantum research, semiconductor device testing, radar and LiDAR simulation, and the development of modern communication systems.