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|Descr:||Samsung SP-R5100 schematic|
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|SPR5100D.pdf||12. Schematic Description and Diagram
1. CIRCUIT DESCRIPTIONS OF HANDSET RF
The system uses the T.D.D.method that the system receives RX signals and transmits TX signals through only one antenna and carrier frequency. The system also uses the TDMA method using one slot among24slots. The frequency range of TX and RX is from 1881.792MHz to 1897.344MHz. The equipment uses DECT RF module.
1) ANTENNA The system uses the antenna of Ě╬ herical type to communicate with the microwave signal. /4 2) RF module The operating voltage of this module is 3.6Vdc normally and supplied by BATT directly. The clock of module uses 13.824MHz. The outgoing siginals of module are SLICE OUT, DEMODE OUT,VCC REFand RSSI siginal. This RF module░ě pin assignments are as follows. s : 9 and 10 are TX POWER SUPPLY. 28 is the supply voltage for other circuits within RF Module. B) GND : 1,3,5,6,7,15,30,31 and 32. C) TX PA RAMP : It controls transmit power AMP.(pin number : 8) In case of |
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