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VMR6512 HIFI Audio Transmition Board General Description

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VMR6512 HIFI Audio Transmition Board General Description Powered By Docstoc
					                   VMR6512 HIFI Audio Transmition Board

General Description
     This is a simple board designed to demonstrate the basic function of V-Module’s
HIFI Audio FM transmitter. It has a power connector, a stereo earphone jack and two
buttons. Power supply is connected to the power connector, the voltage must be
2.7V-3.6V. The audio signal is input from the earphone jack. 2 buttons are used to
adjust the working frequency of the board. Each time the UP/DOWN button is
pressed, the working frequency will increase/decrease 0.1MHz. It’s extremely easy to
build some garget like in-car MP3 transmitter or in-house audio transmitter with this
small board.


Characters
   Supply voltage: 2.7-3.6v
   Working current: <40ma
   RF Power: 115dBuV
   Working frequency: 76.0-108.0MHz
   Transmitting range: >50m (open area, 75cm antenna, 100MHz)
   Board size: 46mm x 30.5mm x 18mm
   Weight: 12g


User instruction
 Power Connector:       2.7-3.6V DC power input.
 Stereo Jack: 3.5mm jack, Stereo audio input.
 External Connector:      external pins used to control the on-board VMR6512 by
  external controller.
 Button UP/DOWN: Buttons used to change the working frequency of the
  board. Each time they are pressed down the working frequency will
  increase/decrease 0.1MHz.
 Antenna pad: RF output. Simply connect a wire to this pad. Optimized length
  is 1/4 wave length of working frequency, for example, 75cm for 100.0MHz


Notes
 Default working frequency is 100.0MHz
 When up/down button are pressed simultaneously, the working frequency will be
  reset to 100.0MHz.
 Do Not power the board with voltage higher than 3.6V. If a li-on battery is used,
  an 1N4148 diode(or other silicon diodes) should be connected between the
  battery and the VCC pin of the power connector.

				
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