Specifications

Rev 1.0 1/27/14 8
List of Figures
Figure 1.! Functional Architecture ............................................................................ 11!
Figure 2.! RF Architecture ........................................................................................ 12!
Figure 3.! USR3500 Mechanical Drawing ................................................................ 14!
Figure 4.! Front Interface ......................................................................................... 15!
Figure 5.! Power Supply Connector ......................................................................... 16!
Figure 6.! Equivalent Circuit of V
IL
, Vref = 2.8V ....................................................... 17!
Figure 7.! Equivalent Circuit of V
IH
, Vref = 2.8V ....................................................... 18!
Figure 8.! Equivalent Circuit of V
OL
, Vref = 2.8V ...................................................... 18!
Figure 9.! Equivalent Circuit of V
OH
, Vref = 2.8V ..................................................... 18!
Figure 10.! Equivalent Circuit of V
IL
, Vref > 2.8V ....................................................... 19!
Figure 11.! Equivalent circuit of V
IH
, Vref > 2.8V ....................................................... 19!
Figure 12.! Equivalent circuit of V
OL
, Vref > 2.8V ...................................................... 19!
Figure 13.! Equivalent circuit of V
OH
, Vref > 2.8V ...................................................... 19!
Figure 14.! 15-Pin Serial Connector .......................................................................... 21!
Figure 15.! RS232 Serial Link Signals ....................................................................... 23!
Figure 16.! V24 Serial Link Implementation for a 5-wire UART ................................. 24!
Figure 17.! V24 Serial Link Implementation for a 4-wire UART ................................. 24!
Figure 18.! V24 Serial Link Implementation for a 2-wire UART ................................. 25!
Figure 19.! Equivalent Circuit of CSPK ...................................................................... 28!
Figure 20.! Mini-B USB Connector............................................................................. 29!
Figure 21.! USR3500 Back Interface ......................................................................... 30!
Figure 22.! Main RF Connector.................................................................................. 31!
Figure 23.! Secondary RF Connector for USR3500 .................................................. 32!
Figure 24.! GPS RF Connector for USR3500 ............................................................ 32!
Figure 25.! Reset Sequence Diagram ....................................................................... 39!
Figure 26.! USR3500 expansion compartment .......................................................... 41!
Figure 27.! Recommended Power Supply Connection on Trucks ............................. 48!
Figure 28.! Example of an Electrical Connection That May Damage the modem ..... 49!