Check Antenna Connection on an X2-CB

The telemetry antenna for cellular or radio X2-CB loggers threads onto a dedicated RF connector port on top of the CB-plate. If signal strength or connection reliability issues occur in the field, check and inspect the condition of the RF antenna connection.

Component Overview

Check antenna connection

Figure 1: Cellular/Radio Antenna (left) separated from the connector bushing (right).


RF antenna connection on plate

Figure 2: X2-CB RF Plate Connector.


Verify a Connection is Tight

  1. Grab the antenna bushing and apply slight downward pressure while rotating it clockwise.
    1. The assembly is tightened fully if a moderate amount of rotational force does not result in movement.

      Figure 3: Tighten antenna bushing to plate port.


Inspect the RF Connectors for Moisture

  1. Grab the bushing of the antenna and turn the assembly counterclockwise to remove it.

    Figure 4: Rotate the antenna bushing counterclockwise to remove the antenna.


    Figure 5: Antenna and bushing removed from CB-plate.


  2. Un-thread the antenna from the bushing and inspect the O-ring at the antenna base.
    1. Verify proper alignment in the groove and that there are no signs of tears or other damage.
      RF antenna O-ring

      Figure 6: Verify Antenna O-ring is intact and seated properly.


  3. Inspect the RF connector of the antenna and verify there are no signs of moisture, corrosion or coaxial contact damage.
    1. If moisture is visible, use canned air to dry it out.
      Check RF antenna connector

      Figure 7: Verify the antenna’s RF connector is free from moisture, corrosion, or coaxial socket damage.


  4. Inspect the RF port on the CB-plate for signs of moisture intrusion or damage in a like-manner.
    1. Also check that the small exterior O-ring near the top of the port is seated in its groove properly.

      Figure 8: Verify the CB-plate RF port is dry and clean.


  5. Rethread the bushing back on the antenna, double-checking the antenna O-ring stays seated. Verify the connection is hand-tight.

    Figure 9: Thread the bushing back onto the antenna. Turn the bushing-to-antenna connection until hand-tight.


  6. Align the antenna assembly with the RF port on the plate. Apply even downward pressure while rotating the bushing clockwise until securely tightened to the plate.

    Figure 10: Push down on the antenna assembly and turn the bushing clockwise to securely re-install the antenna.