Motorola M12 Oncore User's Guide download pdf (Page 24)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

RECEIVER MODULE INSTALLATION

Your Oncore receiver has been carefully inspected and packaged to ensure optimum

performance. As with any piece of electronic equipment, proper installation is

essential before you can use the equipment.

When mounting the Oncore receiver board into your housing system, special

precautions need to be considered.

INSTALLATION PRECAUTIONS AND CONSIDERATIONS

Before you install an Oncore receiver, please review the following precautions and

considerations.

Electrostatic Precautions

The Oncore Receiver printed circuit boards (PCBs) contain parts and assemblies

sensitive to damage by electrostatic discharge (ESD). Use ESD precautionary

procedures when handling the PCB. Grounding wrist bands and anti-static bags are

considered standard equipment in protecting against ESD damage.

Electromagnetic Considerations

The Oncore receiver PCBs contain a very sensitive RF receiver; you must observe

certain precautions to prevent possible interference from the host system. Because

the electromagnetic environment will vary for each OEM application, it is not possible

to define exact guidelines to assure electromagnetic compatibility.

The frequency of GPS is 1.575 GHz. Frequencies or harmonics close to the GPS

frequency may interfere with the operation of the receiver, desensitizing the

performance. Symptoms include lower signal to noise values, longer TTFFs and the

inability to acquire and track signals. In cases where RF interference is suspected,

try moving the antenna away from the source of the interference.

Revision 5.0 08/30/02

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Motorola M12 Oncore User's Guide Page 24