User's Manual

Sterling-LWB Module
APPLICATION GUIDE
The information in this document is subject to change without notice.
Sterling-LWB User Manual Copyright © 2016 LSR Page 24 of 30
6.4 Module Integration Considerations - Circuit Implementation
It is recommended that all connection PCB (printed circuit board) traces to the power supply and digital
control terminal be as short as possible. Though not necessarily required in all cases, it is a best practice
to provide an optional shunt capacitor placement at the module pin on all active and routed power
supply and digital control lines. Further, a series damping resistor placement should be incorporated
between the module pin/shunt capacitor node and the source/sink of the digital control signals. This
provides for effective bypassing and decoupling of digital lines from the radio module, in the event that
the application circuit has longer power supply and digital routing.
6.5 Module Integration Considerations - Top Assembly
In addition to the recommendations given for the antenna systems and the module placement onto a
product PCB, it is recommended that all wiring and interconnect systems within the product not be
routed anywhere close the module and its associated circuitry on the PCB, doing so could change the
emission characteristics of the module.
6.6 Testing Requirements for End-Product
Once the module is integrated and the end-product is realized, the end-product must be tested and
follow the verification process for Unintentional Conducted and Radiated Emissions in accordance to the
FCC and IC guidelines. The module needs to be powered and placed in the receive mode for this test.
The receiver must be tuned to its lowest frequency channel, mid-frequency channel, and highest
frequency channel. The supporting test data does not need to be submitted to the FCC or IC.
The implementation of the module in a specific end-product should also be reviewed to ensure
compliance with the FCC and IC requirements for SAR and MPE. Additional information for SAR
requirements of this module can be found in this document.