Motorola M12 Oncore User's Guide download pdf (Page 27)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

Mounting Hardware (Continued)

The recommended screws for the standoffs that will secure the Oncore to the

standoffs are metal screws with 4-40 threads or M3 threads. The nominal torque to

assemble the Oncore PCB with screws to the standoffs is 6 in-lb each with a

maximum of 7 and minimum of 5 in-lb. Washers are not required nor recommended

for use with the Oncore PCB. All design and process validation testing was

completed with metal screws mounted directly onto the PCB without washers.

Figure 3.8: Layout of the Oncore PCB cross section with reference to the

standoff and screw

Revision 5.0 08/30/02

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Motorola M12 Oncore User's Guide Page 27