RF modulator, with 8 A/V in and 1 RF out, 8 channel agile modulator. RF Modulator,Features1.8 audio/video input, one RF output ... intermediate frequency, video high frequency process and RFlocal oscillator, with high stability and accuracy. 4. Integrated circuit is applied ... each functional circuit of the overall unit adopts SMT technology, with high security.5. LED displays frequency, using up and ...