Mating of VNA Test Cable and Connector

When mating the VNA Test Cable with the corresponding connector, once it deviates from the correct alignment position, it is easy to cause damage to the center conductor and dielectric layer of the VNA Test Cable. Even a slight misalignment in the alignment between the two connectors to be mated can adversely affect the VNA Test Cable.

                                          
The correct approach is to hold the connector firmly so that it does not rotate, thereby preventing damage to the contact finish and plating, or transmitting torque to the VNA Test Cable. Once the connector is dirty, suspected to be damaged, misaligned, damaged by over-torque, or damaged by the threads of the coupling nut, it is no longer usable.

                                           
Although few engineers would admit, coupling nuts are not always secured with a torque wrench, and in some sensitive VNA Test Cable test measurement environments, torque wrenches are sometimes even avoided. This is because beginners and veterans alike want to develop a "feel" for determining when a connector has been rotated into place. However, once a connector is over-torqued, the connector will transmit its own error to the corresponding VNA Test Cable and any other connector mated to it, resulting in a "total series error" in the measurement. The torque wrench used by the VNA Test Cable is a precision tool.