S-Parameter Test Set for Pulsed Networks

A scattering parameter test set that operates in a pulsed mode for analyzing RF/microwave networks has been developed. Designed for analyzing various components of accelerator RF systems, the test set is applicable to a variety of components at different frequencies. The test set consists of an embedded processor, a tracking downconverter, a dual channel vector detector, a timing distribution module, a pulse generator, and a signal generator. The majority of the hardware is packaged in the modular VXIbus architecture, and the control software is National Instruments' LabVIEWO. Measurements of systems have been made centered around 425 MHz, 850 MHz and 1300 MHz, although other frequency regimes are available. This test set sweeps frequency and amplitude levels while measuring the in-phase and quadrature components of the incident, reflected, and transmitted signals.