900MHz Hi-Fi Stereo signal forwarding system

Model No. UD900RT02  
 (US Patent No. 5,870,005)

The system consists of a FM stereo MPX Transmitter module for sending out the Hi-Fi audio at 900MHz and also a 900MHz receiver to retrieve the audio output to any Hi-Fi system input.

 


A.  Transmitter module specification (UD900RT02-T)

1. Frequency Coverage                                                       : 912 – 914 MHz

2. Modulation                                                                     : FM with stereo MPX

3. MPX sub-carrier frequency                                              : 19 KHz pilot tone carrie

4. FM input audio pri-emphases                                          : 75 µs

5. Audio input impedance                                                   : 50K Ohm

6. Audio input level                                                             : 200mV

7. RF Out level                                                                   : 0dBm

8. Transmitting antenna                                                      : concealed & integrated

9. Power supply                                                                 : +5V DC (+/- 5%)

10. Current consumption                                                     : 80 mA max


B.  Receiver Module specification (UD900RT02-R)

1. Frequency Coverage                                                      : 911.5 – 914.5 MHz

2. Sensitivity                                                                      : 8 µV @S/N =30dB

3. Audio output level                                                           : 100mV (L=R)

4. Audio output impedance                                                 : 1K Ohm

5. Signal to Noise ratio                                                       : 45dB min.

6. Frequency Response                                                     : 50 – 12 KHz

7. Distortion                                                                       : 0.6%

8.Power supply                                                                  : +8 ~ +12V

9. Current consumption                                                      : 85mA max

10. Receiving Antenna                                                        : concealed and Integrated

 

                        C.  Effective operating range : 80 meter at open field

 

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