Precision loads - low intermodulation and best performance
Nowadays, no development, production, testing, or quality control department that deals with RF signals on coaxial lines can afford to dispense with state-of-the-art high-precision equipment. It’s essential to use vector network analyzers (VNAs) in particular with high-precision connectors, terminations, and adapters.
Systematic errors can be fixed by calibrating the VNA. Different calibration standards with defined and known electrical characteristics are applied and compared to identify error coefficients. A technique called vector error correction is used to characterize error terms while applying known standards in order to remove errors from actual measurements and increase the accuracy of the results.
A VNA can be calibrated in different ways depending on the required degree of accuracy. The methods used differ in both the number and the type of the calibration standards applied.
The most commonly used calibration approaches are OSL (which stands for open-short-load) for single-port measurements and OSLT (for open-short-load-through) for multiple-port measurements. The order of the standards can vary in the designation; for example, the abbreviation SOLT is occasionally used synonymously.
Test setups or systems terminated with a load ideally should be free of intermodulation to avoid distorting the test results. A 0.25 W precision load DC-20 GHz NEX10® male screw load is boasting outstanding Passive Intermodulation values and is suitable for terminating a 50 Ω coaxial system over the frequency range of DC to 20 GHz. It has been developed for indoor use in laboratories and is made of lead-free and BeO-free materials.
This product has gold-plated connections and is based on the better quality classes of the IEEE, ICE standards with regard to lower tolerances. SPINNER also uses the term ‘precision’ here to emphasize the suitability for exceptionally high-precision measurements.
Antenna and radio units for small cell applications are steadily shrinking, so it makes sense to also create ever-smaller connector systems for them. Designed to excellently meet the mechanical and electrical needs of small cell products, the new NEX10® is now conquering the market.
The screw connection, especially when mounted with a suitable torque wrench, provides the strongest hold and a constantly secure fit of the cable. In addition, the center slots in the contacts provide high contact pressure between the cable and the connector for optimum conductivity and signal strength.
SPINNER RF measurement components meet highest standards
SPINNER has set new standards of accuracy with this product line, which includes a large family of coaxial test equipment with outstanding electrical and mechanical attributes for use in laboratory and production environments.
For the production SPINNER applies extremely high standards regarding quality, engineering, materials and manufacturing e.g. DIN EN ISO 9001 - Quality Management, DIN EN ISO 14001 - Environmental Management and ISO 50001:2011 - Energy Management. This enables us to offer precision loads with the best possible performance and lowest possible intermodulation (Low PIM).
