RFoF system gain depends on the RF frequency signal. If the RFoF system gain doesn’t change much for the whole bandwidth that the unit supports, it is said to have a flat response. System gain is important for deployments where the input signal frequency changes. RFOptic units are very flat, meaning there is not much variation in the system gain. For example, RFOptic’s 3 GHz RFoF solution has a flatness of ±1.5 dB between 5 MHz to 3 GHz, and ±2.5dB between 5 MHz to 6 GHz.