This kit marks a departure from the usual practice of kit manufacturers, in that it is a no-tune unit. The only other adjustable components are a variable capacitor to set the centre frequency of the PLL reference oscillator, and a variable resistor to set the audio gain. Build in stereo encoder and and 15 KHz low pass filter. The frequency is programmed by using two push buttons, each push increments or decrements the output frequency by 50 KHz. The frequency and other parameter can be display form LCD.

PLL-10830K Manufacturer: RF Application Co., Ltd. Product Name: Professional FM Stereo Exciter Model # : PLL-10830K Price: $499.00     Data Sheet   User Guide Download Product Features Frequency range 87.5 – 108 MHz Balanced audio input Broadband design Audio input Level adjustable RF output 0.3 to 0.5 Watt Build in limiter ON/OFF Build in high quality stereo encoder SMD design Build in 15KHz filter Level audio input L&R display High quality sound LCD display 16x4  Technical Specifications  Physical and Environmental Specifications  Frequency Range   87.5 – 108 MHz    Operating Temperature  ‐10°C to +50°C (+14°F to +122°F)  Power output   0.3 - 0.5 watt    DC input requirement  24‐0‐24Volts@1A, 0V (24‐0‐24V)  Output impedance   50 ohm    Dimension  13.0 X 27.0 X 4.0 cm. (W x H x D)  Second harmonic   >‐35dBc    Weight  0.5 Kg.  Audio frequency response   10Hz – 15KHz        Channel separation   >45dB       Display  LCD size 16X4