support multiple standards (B/G, I, D/K, M/N, L), and can be programmed to support PAL, SECAM,
and NTSC formats. The devices are programmed by a high-speed I2C Bus. RT500 modulators use
internal PLL with on-chip LC tank covers the full VHF & UHF range by internal frequency divider and
advance spurious rejection technique to rejection unwanted harmonic with typical 40dBc range.
On-chip LNA can realize Loop-Through function to summary or bypass antenna TV signal. Audio
AM/FM modulations in RT500 are realized by sound subcarrier oscillator, it covers all broadcast
standards (4.5/5.5/6.0/6.5MHz).
The RT534 series RF modulators are designed at the special mode for NTSC ch3/4 from RT500
architecture. It also simplifies by eliminating I2C control to 2 pin switch control.
All devices are available in a 20-pin QFN, Pb-free package.
