R&S develops OSP modular platform for wiring RF test equipment and DUTs

November 25, 2014 // By Graham Prophet
Seven new modules have been added to the Rohde & Schwarz OSP open switch and control platform, making a total of 28 modulesf or implementing a variety of RF wiring configurations between test instruments and DUTs. Users can reproducibly configure automatic path switchovers in complex RF test systems and control them via Ethernet.

The modular R&S OSP gives test engineers in production facilities, test labs and R&D departments a wide range of options for quickly setting up RF wiring configurations and controlling them manually or via a computer. As opposed to manually reconnecting RF lines, the test system switches between the connected instruments, DUTs, filters and antennas quickly, reliably and reproducibly.

Added is an I/O module that makes it possible to control external equipment via differential lines. It offers 16 differential RS-422 outputs and four analogue output voltages for controlling devices such as antenna systems.

Two transfer relay modules (DPDT) each have two SMA or N relays, making it easier to implement cross-wiring between two RF paths. A non-terminated octuple changeover relay (SP8T) has also been added.

Universal SPDT and SP6T monostable relay modules now have bistable versions. When the control voltage is removed, they do not return to their original switching state but remain in the same state. As a result, the control voltage is needed only for switching and not for the switching state's complete duration. This reduces power consumption, in particular in large test systems, and maintains the switching state when the supply voltage fails.

Power sensors from the R&S NRP-Z family can now be integrated into the R&S OSP, enabling users to set up compact configurations for power measurements.

The open switch and control platform is applicable to setting up EMC and OTA test systems. The R&S OSP120 and R&S OSP130 base units can be expanded with the R&S OSP150 extension unit via CAN bus, ensuring security of investment for future system expansions.

Rohde & Schwarz; www.rohde-schwarz.com