User`s manual
A2541R24x – User’s Manual Page 17 of 36
Release Date 11/22/13
The end user is responsible for ensuring compliance with harmonized frequencies and labeling
requirements for each country the end device is marketed and sold.
For more information see:
Radio And Telecommunications Terminal Equipment (R&TTE)
http://ec.europa.eu/enterprise/rtte/index_en.htm
European Conference of Postal and Telecommunications Administrations (CEPT)
http://www.cept.org/
European Telecommunications Standards Institute (ETSI) http://www.etsi.org/
European Radio Communications Office (ERO) http://www.ero.dk/
2.1.4. Bluetooth Special Interest Group (SIG)
The A2541R24A and A2541R24C modules have been certified and listed as Bluetooth smart
devices under the following categories:
2.2. Potential Interference Sources
The radio modules operate in the unlicensed ISM band, in which there are many other
applications e.g. WLAN, Classic Bluetooth and microwave ovens. This can cause interference
that may, in certain conditions, prohibit radio communication.
Some of the most common interferences are listed below:
2.2.1. WLAN
Wireless Local Area Networks (WLANs) are divided into a number of overlapping channels.
Figure 4 below shows the channels used by WLAN; for the US and Canada, only channels 1-13
may be used. Predominantly, channels 1, 6 and 11 are used to achieve non-overlapping
channels. The user is therefore encouraged to select a channel scheme that also has channels
falling in between, or entirely outside, WLAN channels. Using a detection scheme (clear channel
Model Number Type QDID Memo
A2541R24A10 Controller Subsystem B021836 Antenna Module Based on TI's CC2541 transceiver IC and BLE stack
A2541R24C10 Controller Subsystem B021836 Connector Module Based on TI's CC2541 transceiver IC and BLE stack
Controller Subsystem B021836
Host Subsystem B017183
Controller Subsystem B021836
Host Subsystem B017183
A2541R24A20
Antenna Module Based on TI's CC2541 transceiver IC and Emmoco's Software
based on TI's Host Subsystem
A2541R24C20
Connector Module Based on TI's CC2541 transceiver IC and Emmoco's Software
based on TI's Host Subsystem