Maxon Electronics Australia Pty. Ltd. MM-5500U 사용자 설명서
FCC Documentation- MM-5500U CDMA 1x/EVDO Modem
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5. Circuit description
5.1 MM-5500U CMDA 1x/EVDO Modem circuit description
The MM-5500U CDMA 1x/EVDO modem consists of the CDMA Engine, power generation part,
digital part, RF part and connectors. The Fig 5-1 is block diagram of MM-5500U CDMA 1x/EVDO
modem.
Logic part
Rx
Tx
Synthesizer
RF part
LNA
Power
Amp
MSM5500
Memory
-Flash(64Mb)
-SRAM(32Mb)
Power
interface
U701
MIC39102
(LDO)
Iout=1A
Vout=3.8V
RF Vcc
Audio interface signal
Ear-jack
port
CDMA Engine
MM-5500U Block Diagram
protection
DUX
DC5V
Debug Port
*only test
CDMA
Antenna
LED
U703
ISP1105W
(USB
transceiver)
D+
D-
USB
Connector
(DWAP-02-04)
RF S/W
Figure 5.1 MM-5500U CDMA 1x/EVDO modem block diagram