A cost-effective approach for Cable Television (CATV) signal transmission over a Wavelength Division Multiplexing Passive Optical Network (WDM-PON) is proposed and CATV signal transmission performance is analyzed in detail. The analytic models for a fundamental optical link,consisting of optical amplifier spontaneous emission (ASE) source, Mach-Zehnder Modulator, optical filter, transmission fiber and photodiode,are presented. Considering a variety of system noises’ influence on the transmission performance of CATV signal, the analysis concentrates on the impact of optical modulation depth, average received optical power and ASE spectrum-sliced bandwidth on Signal-to-noise Ratio (SNR). The numerical analysis shows that SNR can reach above 43 dB at the bandwidth of 750 MHz, thus meets the need of CATV transmission over fiber to the home. From the experiment result, it is seen that EDFA can effectively suppress the relative intensity noise, improving SNR by 3-4 dB.