Following are the best practices for connecting antenna cables to the device ports for cabled-out types of antennas (typically mobile and GNSS):
Ensure cable ends are connected to the correct ports.
LTE and GNSS ports use standard SMA connectors and Wi-Fi ports use RP-SMA. Check cable ends to ensure they are the appropriate connection type for the port to which you are attaching them.
GPS/GNSS ports can be either active or passive. An active antenna requires an active endpoint port with suitable ratings to work properly. A passive antenna may be used on a passive port and can often be used on an active port, if the antenna is not a DC short-circuit type (for example, Loop and PIFA antennas are typically DC short circuit).
Do not over-torque the SMA connector on the modem. Finger-tight is sufficient (maximum torque is 4 in-lbs/ .45 Nm).
Coax cable has signal loss, especially for higher frequencies. For cable runs 4.6 m (15 ft) or longer, use low loss LMR400 or similiar whenever possible.
Plan cable runs to minimize signal loss. Use the fewest number of coax cable fittings and adapters to minimize unnecessary signal loss. Avoid sharp bends in the cabling.
Use cable clamps or other cable-holding mechanisms to secure low-loss cables against a wall or pole.
Use at least two clamps on the cable near the Cradlepoint endpoint. This construction helps reduce stress on the cable/modem connection and increases product reliability.
Use lightning protection in applicable situations (such as fixed outdoor installations).