The 31326 is used to protect the TX321 GPS RF input by arresting electrical surges to ground. Usage is optional. The 31326 is a GPS RF surge protection kit with flange mounting bracket. It may be flange-mounted to an enclosure backplate or bulkhead-mounted through an enclosure wall. One side of the surge protector connects to the TX321 GPS receiver. The other side connects to the GPS antenna cable. The surge protector passes up to ±6 Vdc, commonly needed for active GPS antenna applications.
The 31326 is not compatible with the 31182 or 18017-L without a Type N to SMA adapter.