ETSI EN 300 328 RX Blocking Test for Bluetooth Low Energy

ETSI EN 300 328 RX Blocking Test for Bluetooth® Low Energy

This application report describes the setup and procedure used to measure the new ETSI EN receiver (RX) blocking test added to version v2.1.1 of the ETSI EN 300 328 harmonized standard.

Project collateral discussed in this application report can be downloaded from the following URL: http://www.ti.com/lit/zip/swra536.

Trademarks

SmartRF is a trademark of Texas Instruments.

Bluetooth is a registered trademark of Bluetooth SIG, Inc.

Wi-Fi is a registered trademark of Wi-Fi Alliance.

ZigBee is a registered trademark of ZigBee Alliance.

All other trademarks are the property of their respective owners.

1 Introduction

ETSI EN 300 328 is a European harmonized standard that specifies the regulatory requirement for data transmission equipment operating in the 2.4 GHz ISM band and using wide band modulation techniques in Europe. This standard covers technology such as Wi-Fi®, Bluetooth and ZigBee® but also other proprietary transmission systems that use the 2.4 GHz ISM band.

In the current version of V2.1.1, which was released in November, 2016 under the European Radio Equipment Directive 2014/53/EU (RED), a new requirement regarding receiver blocking performance was added and this application report shows how it can be measured for a Bluetooth low energy system using a Rohde & Schwartz vector signal generator. The same method can be applied for most other transmission systems or signal generator vendors.

2 ETSI EN 300 328 V2.1.1 Requirement

The ETSI specification divides receivers into three different categories: category 1 to category 3. The categorization can be found in the Categorization section in the ETSI specification (V2.1.1, 2016, p.15). Bluetooth low energy devices fall in either category 2 or category 3 based on Medium Utilization (MU), a product of TX duty cycle and output power. Category 2 covers devices with output power between 0 and 10 dBm assuming 100% duty cycle, and has stricter requirements than category 3. As the CC2640 easily fulfills the requirements for category 2, we will only focus on these requirements throughout this document.

The blocking requirements for receiver category 2 is found in the Receiver Category 2 section in the ETSI specification (V2.1.1, 2016, p. 38).

Table 1. Receiver Blocking Parameters Receiver Category 2 Equipment

Wanted Signal Mean Power From Companion Device (dBm)	Blocking Signal Frequency (MHz)	Blocking SIgnal Power (dBm) (see ⁽²⁾)	Type of Blocking Signal
P_min + 6 dB (see ⁽¹⁾)	2380 2503.5	-57	CW
P_min + 6 dB (see ⁽¹⁾)	2300 2583.5	-47	CW

(1) P_min is the minimum level of the wanted signal (in dBm) required to meet the minimum performance criteria as defined in the clause in the Performance Criteria section of ETSI EN 300 328 V2.1.1 in the absence of any blocking signal.

(2) The levels specified are levels in front of the UUT antenna. In case of conducted measurements, the levels have to be corrected by the actual antenna assembly gain.

Tests should be performed at both lowest and highest operating frequency according to the Test Conditions section in the ETSI specification (V2.1.1, 2016, p. 72).