射频器(第3/4ch器)

RF modulator connected between the TV and VCD. Through the modulator, can be no old-fashioned audio and video jack on a TV connected to VCD, to be shown the effect of VCD. Features: Image clarity, stereo, low noise, nothing to do with scratch using low-power techniques applied to non-AV input jack, old-fashioned TV to watch VCD or play TV game consoles. RF modulator combines these three signals and substitutes them as a pseudo-channel on your cable/antenna line--usually channel 3 or channel 4. Newer models will auto-detect a signal and substitute when the A/V component is turned on, while older models may require some sort of manual switching. RF Modulators can be useful for several reasons. Suppose you have an old TV without Scart or phono connections. You can watch TV on it but that's about all. You can't use a games console, a set top box, a camcorder etc. By using a RF Modulator you can modulate the signal from a Scart or phono device so that it can be connected to a RF aerial. RF Modulators can also used to convert and send send satellite, Freeview, VCR or DVD signals TV around a home on RF coaxial aerial cable. 3/4ch modulator(RF modulator to 3 or 4) 1. System:NTSC/M 2. AV to RF 3. 1 RCA signal input 4. Cable TV or extemal antenna input 5. RF output channels:3 or 4 CH 6. Power:AC90V-240V