InP oscilloscopes feature 16GHz bandwidths

The chipset will allow the company to deliver oscilloscopes with true analogue bandwidths greater than 16GHz.

Engineers working with high-speed serial data links such as USB, SATA or PCI Express use oscilloscopes to measure jitter and other parameters to ensure compliance to industry standards for interoperability.

In the next few years, as data rates extend beyond 8.5Gb/s, engineers will need oscilloscopes with true analogue bandwidths greater than 16GHz.

In addition, the upcoming IEEE 803.2ba 40/100G standard will drive the need for high-quality, real-time signal analysis capabilities to 16GHz and beyond.

Other vendors claim they can achieve higher bandwidths using bandwidth-enhancing techniques such as digital signal processing (DSP) and frequency domain interleaving (sometimes referred to as digital bandwidth interleaving or DBI).

However, the additional noise and jitter generated with these techniques can interfere significantly with an oscilloscope's measurement accuracy and impact its frequency response.

Silicon process technologies commonly used today are unable to achieve true analogue bandwidths above 16GHz.

Other vendors are using silicon technologies with transistor switching frequencies in the 100GHz range.

This frequency limit presents significant barriers to delivering higher true-analogue bandwidths.

Agilent's investment in the InP process extends the capabilities of the company's InGaP HBT (heterojunction bipolar transistor) IC technology, enabling high-frequency capability with transistor switching frequencies up to 200GHz.

InP technology offers the same capability without sacrificing the reliability and manufacturability associated with Agilent instrumentation.

The InP process technology also has superior material properties compared with Agilent's prior-generation gallium arsenide (GaAs) process.

InP technology provides higher saturated and peak-electron velocities, higher thermal conductivity, lower surface recombination velocity and higher breakdown electric field.

These benefits mean true analogue bandwidths can be pushed to new limits.

In addition, InP technology provides the following measurement benefits compared with other available technologies: significantly flatter response at high frequencies; higher measurement accuracy because of the low-noise, nonconductive substrate; and higher reliability due to lower power consumption.

Agilent built an in-house fabrication facility to gain ultimate control of precision in the InP process.

The company is already using the InP process in the J-BERT N4903B high-performance serial BERT - which offers complete jitter tolerance testing - and in the N4916B de-emphasis signal converter.

InP technology has delivered pulse fidelity to rise times faster than 20ps and offers headroom for tomorrow's needs.

Agilent currently offers high-performance Infiniium 90000 Series oscilloscopes with bandwidths up to 13GHz.