Pico Technology PicoScope 9321

At 20 GHz bandwidth the Pico Technology PicoScope 9300 sampling oscilloscopes address digital and telecommunications applications of 10 Gb/s and higher, microwave applications up to 20 GHz and timing applications with a resolution down to 64 fs. Optional 11 Gb/s clock recovery, optical to electrical converter or differential, de-skewable Time Domain Reflectometry sources (40 or 60 ps) complete a formidable, small-footprint and cost-effective measurement package.

Key specifications:

• 20 GHz (17.5 ps) bandwidth
• 1 MS/s sample rate to 32 kS store
• 0.064 ps, 15 THz effective sample rate
• 14 GHz prescaled & 2.5 GHz direct trigger
• Pattern trigger of length 7 to 2²³-1
• Jitter less than 1.8 ps rms 20 ppm delay
• 16 bit, 60 dB dynamic range

The PicoScope 9321 includes a built-in, precision optical-toelectrical converter. With the converter output routed to one of the scope inputs (optionally through an SMA pulse shaping filter), the PicoScope 9321 can analyze standard optical communications signals such as OC48/STM16, 4.250 Gb/s Fibre Channel and 2xGB Ethernet. The scope can perform eye pattern measurements with automatic measurement of optical parameters including extinction ratio, S/N ratio, eye height and eye width. With its integrated clock recovery module, the scope is usable to 11.3 Gb/s. The converter input accepts both single-mode (SM) and multimode (MM) fibers and has a wavelength range of 750 to 1650 nm.

A range of Bessel-Thomson filters is available for standard frequencies. These filters are essential for accurate characterization of signals emerging from an optical transmission system. The first eye pattern, above left, shows the ringing typical of an unequalized O/E converter output at 622 Mb/s. The second eye pattern, above right, shows the result of connecting the 622 Mb/s B-T filter. This is an accurate representation of the signal that an equalized optical receiver would see, enabling the PicoScope 9321 to display correct measurements.