User guide

CM52 Integrators’ Manual
WI_DEV_CM52_UGD_001-001
Page 11 of 53
2 Integrating the CM52 Wireless CPU
®
2.2.1 Mechanical Dimensions
The following figures provide the mechanical dimensions for several CM52 variants (CM52002,
CM52003, and CM52004). There is also a drawing detailing the mechanical keep-out regions.
2.2 Mechanical Description
2.1 Overview
The CM52 is a dual band, dual mode CDMA transceiver Wireless CPU
®
. It operates in the 800 MHz
band for CDMA and AMPS and in the 1900 MHz band for CDMA. It is designed for consumer and
OEM industrial voice and data applications.
The CM52 Wireless CPU
®
is intended for mounting into an application developer’s chassis to
provide wireless communication capability for the product. The target chassis could be in a wide
variety of forms such as a residential electric meter, a point of sale terminal, an alarm panel, or an
automobile console. All initial configuration, mode control, and operational commands are issued
to the Wireless CPU
®
over an RS-232 serial port using a flexible AT command format. The Wireless
CPU
®
circuitry has been designed to meet the environmental requirements of a large range of
commercial and industrial users.
The CM52 has no mechanical elements other than the main PCB assembly. All critical electronic
components are shielded using six cans to prevent internal and external electromagnetic
interference from degrading the Wireless CPU performance and to prevent the Wireless CPU
®
from
interfering with other nearby devices. The Wireless CPU
®
is plugged into the fixed mating
connector and secured with four screws.
The Wireless CPU
®
has no keypad, display, microphone, speaker, or battery. The following figures
show 3-D models of the Wireless CPU
®
.
The antenna interface is provided via a board mounted RF connector at the opposite end of the
board from the system connector. See Section
2.8 for more information on antenna connector
options.
Figure 1: CM52 Primary Side
Figure 2: CM52 Secondary Side
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CM52 Integrators’ Manual