One of the challenges that installers face, is to know that the RFoF link is optical and RF functions are in order. This means using RF measurement tools such as a signal generator and spectrum analyzer and optical power meter. RFOptic solves this issue of fast diagnostic by adding an injection of the pilot signal from the Tx to the Rx. The installer can check the functioning of only the transmitter , or the receiver and the link (transmitter and receiver) by injecting a 15 MHz pilot signal followed by measuring the output signal in comparison to the input. This in itself is not as accurate as RF measurements tools, but it is ideal for field installation without the need to bring heavy and expensive equipment.