70 GHz real-time oscilloscope from Tek claims lowest noise, highest ENOB

March 24, 2015 // By Graham Prophet
Tektronix' claims for its DPO70000SX 70 GHz ATI Performance Oscilloscope include the lowest-noise and highest effective bits of any ultra-high bandwidth real-time oscilloscope available on the market. Tek is aiming it at high-speed coherent optical systems or any leading-edge research workers who need capture very high-speed – especially single-shot – events.

Other prospective purchasers of the unit will include those for whom the ability to capture the widest possible segment of bandwidth in one shot is a necessity. One of the first things you notice about the DPO70000SX is its compact format; in a reversal of recent trends to larger scope screens, this unit has only a small – if detailed – LCD screen. With this format, Tek recognises that most users will view the measurements on an attached monitor; and that at multi-GHz frequencies, short connections to the unit under test are essential and the benefits of the “compact” format will dominate.

Tek cites key features of the scopes as including;

- first 70 GHz real-time oscilloscope with Tektronix’ Asynchronous Time Interleaving (ATI) technology that preserves signal-to-noise ratio for higher fidelity. This means, the company says, that users can more accurately capture and measure their signals at higher speeds than possible with any other oscilloscope available today.

- 200 Gsample/sec sample rate with 5 psec/sample resolution for improved resolution and timing.

- compact form factor that enables the instrument to be positioned very close to the device under test (DUT) while providing flexible display and control for analysis. Reducing the distance to the DUT enables shorter cable lengths which in turn help to preserve signal fidelity at very high frequencies.

- scalable oscilloscope system with Tektronix’ UltraSync architecture that provides precise data synchronisation and convenient operation of multi-unit systems. Precise multi-channel timing synchronisation is key to meeting acquisition requirements in applications such as 100G and faster coherent optical modulation analysis.

As speeds go up and amplitudes go down, system noise becomes a major problem because it obscures important signal details. Through the use of ATI technology, DPO70000SX oscilloscope enables engineers to see more of their signal details with less noise and distortion so they can make better measurements and understand their system operation better.

Tek's ATI approach to high-bandwidth digitising