Insufficient Current Available

NovAtel OEM7 receivers provide up to 200 mA from their RF ports. In cases where the RF equipment connected to the RF port consumes more than this amount, an external power supply and bias-T must be added to the installation. The bias-T should include circuitry to prevent DC power from being fed back to the receiver and the ANTENNAPOWER OFF command must be issued to disable the receiver’s internal LNA power supply. A simple installation with an antenna LNA that requires more than 200 mA is shown in Figure: External Power Supply to Meet Current Requirements.