Setting up the R&S SZU

The R&S SZU is used exclusively in test setups with the R&S SMW vector signal generators, see "Intended use".

The R&S SZU I/Q upconverter is designed for use under laboratory conditions on a flat bench top or mounted on a wafer probe station. Four M8 threads are provided on all long sides of the converter to allow for mounting the converter on a flat surface. Some on-wafer measurement applications can require the converter to be tilted to bring the test port closer to the chuck. In these cases, an additional bent waveguide adapter can be necessary in front of the test port adapter to compensate for the tilt angle.

Typical test setups for OTA testing require short cabling distances between the R&S SZU and the antenna, see Figure "OTA RF measurement test setup".

To mount the feet of the converter

The R&S SZU has four adjustable feet you can mount at each side of the converter.

  1. Mount all four screwable feet on one of the long sides.

  2. Place the R&S SZU horizontal stable position, see "To place the R&S SZU on a bench top".

To place the R&S SZU on a bench top
  1. Place the product on a stable, flat and level surface.

  2. If necessary, adjust the screws of the feet to align the instrument parallel to the bench top.

  3. The top surface is not designed for stacking. If you want to stack the R&S SZU together with other products:

    1. Follow the instructions given for the other products.

    2. Place the R&S SZU on top.

  4. NOTICE!NOTICE!

    Overheating can damage the product.

    Prevent overheating as follows:

    • Keep a minimum distance of 10 cm between the fan openings of the product and any object in the vicinity.

    • Do not place the product next to heat-generating equipment such as radiators or other products.

To mount a test port adapter

The waveguide port is at the front panel.

  1. Inspect the waveguide flange connector of the R&S SZU visually to check that it is clean, undamaged and mechanically compatible.

    Thus, you prevent insertion loss and mismatch, and even premature wear of the connectors.

    Note:Note:

    If the visual inspection shows that the waveguide flange requires cleaning, see "To clean a waveguide port".

  2. Inspect the waveguide port of the test port adapter as described in step 1.

  3. Carefully align the holes of the test port adapter to the pins of the waveguide port of the R&S SZU until they match.

  4. Insert the four included screws and screw them evenly to the waveguide port.

    Example of mounting the waveguide-to-waveguide adapter to the R&S SZU
  5. Tighten the screws with the torque wrench R&S ZCTW until the adapter is firmly connected, see Table "R&S SZU I/Q upconverter front views"

    Recommended torque wrench R&S ZCTW

    The R&S ZCTW-SW 3/32 with 0.58 Nm torque limit is especially designed for waveguide port mounting (order no. 1175.2014.02).