Modemulator User Guide
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Chapter 5: USR3520/USR803520 Technical Specifications
Physical
1 Main Antenna Connection: 50 Ohm SMA female (WWAN Main)
1 Diversity Antenna/GPS Connection: 50 Ohm SMA female (WWAN Div / GPS)
1 10/100 Mbps RJ45 Connector
1 Power connector: 4 pin Micro-Fit™ 3.0, dual row, 2 circuits
7 3-color LEDs showing system status and signal strength
1 reset switch
1 internal SIM slot (1.8V/3V) - USIM/SIM Class B and Class C
DTE interface: 1 RS-232 DB9 Male connector
DCE interface: 1 RS-232 DB9 Female connector
2 LEDs indicators: system connect status, operating mode
1 mode switch: Modemulator/Gateway
Serial Port Ratings
Terminal Port RS-232C DCE: Auto-baud detection of 115200, 57600, 38400, 19200, 9600, 4800,
2400, 1200, and 300 bps
Modem Port RS-232C DTE: 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, and 300 bps
Power
The symbol on the label at the bottom side of the gateway shows the power requirements:
Input voltage must be between 9V - 33V DC
Internal electronic fuse limits the input current to 1.2A
Attached to 3G network, no Ethernet, 3G call @ 2100MHz (band I): 361mA
(All power measurements at 12V DC)
USRobotics recommends using a power cable between the external power supply unit and
the gateway that has a wire thickness of 22 AWG!