Data sheet (pdf) Power Meter R&S NRP including Power Sensors R&S NRP-Z11/-Z21 Printable Version (pdf) Technical Information (pdf) Power Sensors R&S NRP-Z22/-Z23/-Z24 Printable Version (pdf) Power Sensor R&S NRP-Z51/-Z55 Printable Version (pdf) Power Sensor R&S NRP-Z91 Printable Version (pdf) Power Sensor Modules R&S NRP-Z27/-Z37 Printable Version (pdf)