User Manual

Interfacing and Controlling the RIM 801D Antenna integration: Shielding 31
RIM 801D OEM Radio Modem – Integrator’s Guide
frequency electrical noise, than to provide additional RF shielding between
other computing devices and the RIM 801D case.
The RIM 801D case provides shielding to prevent it from being affected by
RF interference from the computing device to which it is attached. The case
also prevents the RIM 801D from emitting RF energy into the computing
device and disrupting the computing device’s operation.
The antenna must be positioned in such a way that the radiated energy is
directed away from the computing device. If this is not possible, then RF
shielding may be required between the antenna
and the computing device.
Circuits with a high impedance and sensitive analog circuits are especially
vulnerable to nearby radio frequency emissions, and may need to be
shielded. Typically affected circuits include CRTs and LCD display drivers.
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