STM32W108B-SK STMicroelectronics, STM32W108B-SK Datasheet

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STM32W108B-SK

Manufacturer Part Number
STM32W108B-SK
Description
STARTER KIT FOR STM32W108
Manufacturer
STMicroelectronics
Series
STM32r
Type
MCUr

Specifications of STM32W108B-SK

Featured Product
STM32 Cortex-M3 Companion Products
Contents
Board
Silicon Manufacturer
ST Micro
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
STM32
Silicon Family Name
STM32W108xx
Kit Contents
Board
Features
IEEE
Mfg Application Notes
STM32W108 Adjacent Channel Rejection Measurements
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
*
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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Part Number:
STM32W108B-SK
Manufacturer:
ST
0
1
1.1
2
March 2011
Introduction
This application note describes a method which could be used to characterize adjacent
channel rejection (ACR) on RF chips. It also compares different methods used by other
manufacturers when quoting ACR performance.
Adjacent channel rejection (ACR) is an important parameter for any radio receiver. It is a
measure of how well a receiver performs on its frequency channel when there is an
interfering system in the vicinity operating on a nearby channel.
ACR is generally one of the parameters that is used to compare the performance of different
RF ICs. However, different silicon vendors use different methods for measuring ACR, which
may distort performance figures.
This application note presents a method used to measure ACR on its IEEE 802.15.4-2003
compliant ICs, and compares it against other methods.
Supported STM32W108xx kits
This document is applicable to the following STM32W108xx kits:
Requirements
The IEEE 802.15.4-2003 standard specifies a minimum level of ACR that chips must meet.
It is defined as follows:
STM32W108xx starter kit (part number: STM32W-SK)
STM32W108xx extension kit (part number: STM32W-EXT)
STM32W108xx low-cost RF control kit (part number: STM32W-RFCKIT)
6.5.3.4 Receiver jamming resistance
The minimum jamming resistance levels are given in Table 22. The adjacent channel is
one on either side of the desired channel that is closest in frequency to the desired
channel, and the alternate channel is one more removed from the adjacent channel.
For example, when channel 13 is the desired channel, channel 12 and channel 14 are
the adjacent channels, and channel 11 and channel 15 are the alternate channels.
Adjacent channel rejection measurements
Doc ID 17543 Rev 2
for the STM32W108 platform
Application note
AN3218
www.st.com
1/6

Related parts for STM32W108B-SK

STM32W108B-SK Summary of contents

Page 1

Introduction This application note describes a method which could be used to characterize adjacent channel rejection (ACR chips. It also compares different methods used by other manufacturers when quoting ACR performance. Adjacent channel rejection (ACR ...

Page 2

Interferer waveforms Table 1. Minimum receiver jamming resistance requirements for 2450 MHz PHY Adjacent channel rejection The adjacent channel rejection shall be measured as follows. The desired signal shall be a compliant 2450MHz IEEE 802.15.4 signal of pseudo-random data. The ...

Page 3

AN3218 Figure 1. Comparison of spectra, 25 MHz span It can be seen that the heavily filtered 15.4 signal generated by the signal generator is not representative of either type of modulation technique, and therefore does not give a useful ...

Page 4

Co-channel measurements Figure 2. Comparison of spectra, 10 MHz span 4 Co-channel measurements It should also be noted that co-channel interference measurements should be made using a properly modulated IEEE 802.15.4-2003 signal, and not with an MSK signal with random ...

Page 5

... The use of a filtered 15.4 signal is not representative of a real world scenario, and is not well enough specified to ensure consistency between manufacturers. After reading this document If you have questions or require assistance with the procedures described in this document, contact STMicroelectronics support at www.st.com/stm32w. 6 Revision history Table 2. ...

Page 6

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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