An investigation is made of the performance characteristics of frequency-division multiplexed transmission of TV signals using both electronic and optical power combining. Intensity-modulated light sources and avalanche photodiode detectors with optimized gains are considered. The allowable transmission loss, inter-repeater spacing and total transmission distance are investigated. Optical combining becomes more advantageous as the number of transmitted channels is increased. This technique might allow the use of optical analogue IM transmission in trunk line applications.