Power up the unit and check the antenna connector to ground with a dvm. Believe you will see. 5 V. Good to check. However if the z380X is newer maybe 3.3V.
That antenna should work as long as the cables not to long and the antenna has a good view of the sky. 28 db gains not all that much. But may be good enough for your check.
Best of luck you are making progress. I see Dave answered is a Motorola Oncore receiver.
