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
