Motorola M12 Oncore User's Guide Page 2

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Chapter 3 – Receiver Description
Motorola GPS Products - Oncore User’s Guide
DETAILED TABLE OF CONTENTS
Overview ...................................................................................................................................3.4
Antenna Sense Circuit............................................................................................................3.6
Antenna Feed Current............................................................................................................3.6
Active Antenna Configuration ...............................................................................................3.8
M12+ and M12+ Timer Oncore Receiver Electrical Connections ...................................3.9
Oncore Operation Voltage And Current Ranges................................................3.9
M12+ Oncore Receiver Printed Circuit Board ..................................................................3.10
M12+ Oncore Receiver Technical Characteristics..........................................................3.11
M12+ Timer Oncore Receiver Technical Characteristics ..............................................3.12
GT+, UT+, SL Oncore Receiver Electrical Connections ..................................................3.13
Oncore Operation Voltage And Current Ranges..............................................3.13
GT+, UT+, SL Oncore Receiver Printed Circuit Board .....................................................3.14
GT+ Oncore Receiver Technical Characteristics ............................................................3.15
UT+ Oncore Receiver Technical Characteristics ............................................................3.16
SL Oncore Receiver Technical Characteristics ...............................................................3.17
1PPS Signal Definition ..........................................................................................................3.18
RF Jamming Immunity (UT Model Only).............................................................................3.18
Adaptive Tracking Loops .....................................................................................3.19
Automatic Site Survey (UT Model Only) ............................................................................3.20
100PPS Output (UT Model Only)..........................................................................................3.21
Time Raim Algorithm Description (M12 Timing and UT Models Only)..........................3.22
Receiver Module Installation ..............................................................................................3.24
Installation Precautions And Considerations ...................................................................3.24
Electrostatic Precautions ....................................................................................3.24
Electromagnetic Considerations ........................................................................3.24
RF Shielding............................................................................................................3.25
Real-Time Clock (RTC)..........................................................................................3.25
Thermal Considerations .......................................................................................3.25
Grounding Considerations ...................................................................................3.25
Oncore Receiver Mounting Instructions (GT+/UT+ Only)...............................................3.26
Mounting Hardware Design Guidelines ............................................................3.26
Design and Process Validation Test Information ............................................3.28
Sturdiness and Reliability of Metal Standoffs ..................................................3.29
Design Worksheets...............................................................................................3.29
Mean Time Between Failure (MTBF) .................................................................................3.31
Revision 5.0 08/30/02
3.2
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