If you have received a CalAmp K-12 test kit, you can use it to test your hardware to troubleshoot issues prior to performing an RMA. To use your test kit to check whether an antenna is functioning properly, follow these steps:


  1. Make sure that the antenna you are testing is outside, is pointing up, and has a clear view of the sky.
    Note: If testing outside isn't possible, place the antenna close to a window.
  2. Connect the antenna to an LMU of the type it is normally used with (attaching to the GPS and COMM connectors).
     
    Note: Use a known working LMU for testing purposes or one that you've verified is functioning properly via the steps in Testing an LMU-3641 or LMU-4233 Using the Test Kit.
  3. Power the testing device via the accessory socket (the cigarette lighter socket) in the vehicle; vehicle battery (connecting the adapter cable's black clamp to the battery's negative terminal and the red clamp to the battery's positive terminal); or kit battery (making sure to flip the switch on the kit battery to the On position).
    Note: If you are using the test kit battery, connect it to the testing device via the red cable to the black knob. The test kit battery will arrive with a partial charge; you can charge it if needed.

  4. Physically attach the LMU to the testing device.
     
    If you're testing an antenna that is used with an LMU-3641, attach the LMU using the clips on the side.
     
    If the LMU is an LMU-4233, attach it on the top of the device.
     
  5. Connect the power harness to the LMU and to the testing device.
      
  6. Press the Battery switch.
     
  7. Press the Ignition switch.
     
  8. Check the LMU's LEDs, which should power up and begin blinking.
     
  9. Observe the LEDs for the next five minutes.
     
  10. Verify that they run through this process, in this order:
     
    COMM LED (Orange)
    		Condition
    Off
    		Modem off
    Slow blinking
    		COMM is on and is searching for a tower
    Fast blinking
    		Network available (connected to a tower)
    Alternates from fast to slow blinking every 1 second
    		Registered but hasn't received acknowledgment from the CalAmp K-12 server yet
    Solid
    		Registered and received inbound acknowledgment from the CalAmp K-12 server

     
    GPS LED (Green)
    		Condition
    Off
    		GPS off
    Slow blinking
    		GPS on
    Fast blinking
    		GPS is on and searching for satellites
    Solid
    		GPS fix — the GPS location has been acquired with the minimum required number of satellites

  11. In CalAmp K-12, go to the Fleet Tracking screen and verify that you can see the LMU's associated vehicle at your current location (see Tracking a Vehicle if needed).
     
    If both LEDs go through this process and reach a solid state, and you can see the vehicle on the Fleet Tracking screen, the antenna (and LMU) is functioning properly.
     
    If the green LED does not reach a solid state, make sure that you have a decent line of sight to satellites and are using a known working LMU.
     
    If the orange LED does not reach a solid state but settles on alternating between fast and slow blinking, COMM is connected, but there may be an issue with the CalAmp K-12 server or the quality of the signal.
     
    If these are not the issue, you can submit an RMA for the antenna as shown in Returning Hardware and Obtaining a Replacement (Performing an RMA).