5W 76-108MHz Stereo PLL FM Transmitter

5W 76-108MHz Stereo PLL FM Transmitter

The 5W 76-108MHz Stereo PLL FM Transmitter is an LCD-controlled FM transmitter module designed for the wireless transmission of analog stereo audio or microphone signals within the standard FM broadcast band; it features adjustable frequency and RF output power.

The circuit utilizes DSP and PLL (Phase Locked Loop) based frequency control. Compared to free-running analog FM oscillators, the PLL architecture ensures greater stability of the set carrier frequency. The operating frequency is adjustable within the 76.0–108.0MHz range in 0.1MHz increments.

Specifications

• Operating Frequency: 76.0–108.0MHz
• Frequency Adjustment Step: 0.1MHz
• Modulation: FM stereo
• Frequency Control: DSP + PLL
• RF Output Power: 5W
• RF Output Impedance: 50Ω
• Supply Voltage: 12V DC
• Input Current: Approx. 1A
• Analog Audio Input: Yes
• Maximum Audio Input Level: <1Vpp
• Microphone Input: Yes
• Stereo Channel Separation: >63dB
• Distortion: 0.03–0.1%