User's Manual

3.3.5. Investigating and Obtaining Regulatory Approval

It is your responsibility to obtain regulatory approval of products that integrate an io200 Integrated Wireless Modem. The specific

details for achieving regulatory approval vary from country to country. Refer to “Regulatory Requirements”, page xvi ?, for

further information.

3.4. DEVELOPING AND VALIDATING THE HARDWARE

To develop and validate the hardware, perform the following steps:

• Design the hardware platform

• Consider power supply options

• Select the antenna

• Set up a development test environment

3.5. Designing the Hardware Platform

Integrating a wireless modem into a hardware design requires many steps. Here again, the usage and message models are

necessary to calculate issues such as battery size, heat dissipation, isolation from EMI, and physical mounting of the unit to ensure

proper grounding. Refer to Chapter 3, “Design Considerations”, page 13 ?, for further information.

Hardware design is your responsibility. The host device can introduce electromagnetic interference, which will interfere with the

performance of the modem. This EMI can be conducted into the modem via the serial and power lines, or radiated into the

antenna and antenna cable. It is your task to minimize the generation of EMI by your device so that the modem’s RF performance is

minimally affected. Contact your Motorola OEM representative for details.

3.6. Considering Power Supply Options

Power supply requirements vary according to the usage and message models. In addition to accounting for the current drain of the

modem in its various operating modes, you should also consider ripple and noise on the power lines and the ability to supply

sufficient instantaneous current to enable correct operation of the transmitter. You should also ensure that your power supply can

accommodate the highest power consumption for Io200 modem that you want to integrate.

Together, these requirements define the type and size of power supply (for example, linear versus switched) to use with the

wireless modem. Refer to Chapter 3, “Design Considerations”, page 13 ?, for further information.

It is recommended that the power applied to Io200 have a rise time of less than 1 ms to prevent potential latch up.

Note