FM06TX is an FM PLL radio broadcast board for educational or similar use that offers improved performance over the previous popular version (e.g., better audio quality, adjustable RF out power (up to 6W), easy menu using only four keys, etc.). The previous version is no longer available. You connect audio and send it wirelessly using an external antenna of your choice (coverage varies with surrounding conditions, guaranteed maximum output 6W minimum over the entire band, adjustable from 0.1W). FULL BROADBAND DESIGN, no variable caps to adjust! Reception is on a regular FM radio set anywhere from 87.5MHz to 108MHz (special model for 76-90MHz Japanese band also available) and minimum step of 10KHz.
It has two audio inputs for the left and right channels, which can be set as balanced or unbalanced by the user. Both inputs are pre-emphasized for either 50usec or 75usec (user-selectable) for mono modulation. A third auxilliary input is available for connection of stereo multiplexed signals. Thru it, it can be modulated with a stereo generator signal for excellent quality stereo broadcasts.
The unit comes with a 4x20 LCD with white characters on blue backlight. All power-on frequency as well as all other menu user settings can be saved to the built-in non-volatile memory.
The unit meets all FCC and CCIR requirements for FM transmitters. It has an excellent spectral purity with harmonics rejection better than -60dBc as can be seen a Spectrum Analyser, spurious output better than -80dBc (it is practically undetectable even at 100dB spectrum analyser), and accuracy of the VCO lock-on frequency of +/- 200Hz. RF output is disabled when PLL is unlocked. You can also manually turn the RF output on/off.
On-board double-directional coupler provides FORWARD POWER and VSWR signals to the LCD, and to automatically protect or control external amplifier units.
A stereo encoder is available seperately (as an option).
FM06TX - Stereo FM Transmitter 0-6W
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