PicoTime™ Pico Second Resolution Test Set - Spectracom - #1

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USA | 95 Methodist Hill Drive | Rochester, NY 14623 | +1.585.321.5800 | sales@spectracomcorp.com FRANCE | 3 Avenue du Canada | 91974 Les Ulis, Cedex | +33 (0)1 64 53 39 80 | sales@spectracom.fr UK | 6A Beechwood | Chineham Park | Basingstoke, Hants, RG24 8WA | +44 (0)1256 303630 | info@spectracom.co.uk SWEDEN | Box 20020 | 161 02 Bromma, Sweden | +46 8 598 510 00 | info@pendulum.se Qquality.spectracomcorp.com . . . . . . . . . . . . . . I SO 9 0 0 1 PicoTime™ Pico Second Resolution Test Set • Clock characterization such as quartz crystal oscillator, Rubidium atomic clocks and cesium clocks • Calibration of quartz crystal oscillator, and atomic clocks • Easy to use • Small volume • DUT Frequency Range: 1MHz to 30 MHz • Phase time resolution and noise: <2ps rms • Automatic operation • No calibration required System Description The system is designed to make a direct frequency measurement in comparison with an external 10 MHz frequency reference. Picotime is based on a heterodyne system using direct digital synthesizer (DDS) technology to allow measurements in the range of up to 30 MHz. The external 10 MHz reference divided by 2x107 is used to make time interval measurement each second. Direct frequency measurement is used for programming DDS. The DDS divides the device frequency around 1kHz by using two mixers. As indicated in the block-diagram, the whole system The Pendulum PicoTime™ is a low-cost, high-performance measurement test set. It features a cutting- edge 1ps resolution and an easy-to-use software application for performance analysis. Figure 1: Block diagram Figure 2: System Noise in ideal conditions is based on a heterodyne architecture with a double frequency conversion. Three outputs are available: • 1kHz where a crystal fi lter based PLL is used to restrict the bandwidth to only 1Hz • 1kHz with about several 100 kHz bandwidth • 1pps reference The system is controlled with the PC COM interface. When connecting an external counter, other types of measurements can be performed. The power is supplied by an external power supply converter (230 V~/50 Hz to +12 V DC).