Update of EN 300 328 Standard for Bluetooth, Wi-Fi and other 2.4GHz Products

IoT wireless architecture

RF standard EN300 328 V2.1.1 for wideband transmission systems expires 31st October 2021. It is replaced by EN300 328 V2.2.2. Now is a good time to make sure your product complies with the requirements after the change.

From manufacturer point of view the key changes are:

1. Receiver Blocking Performance Criteria (
Performance criteria is now defined more clearly.

EN300 328 V2.1.1
The minimum performance criterion shall be a PER less than or equal to 10%, or the manufacturer could perform an alternative.

EN300 328 V2.2.2
For equipment that supports a PER or FER test to be performed, the minimum performance criterion shall be a PER or FER less than or equal to 10%. For equipment that does not support a PER or a FER test to be performed, the minimum performance criterion shall be no loss of the wireless transmission function needed for the intended use of the equipment.

PER or FER can be measured as Conducted or Radiated. If you are using a pre-certified radio module the module manufacturer has done the conducted measurements. Please, contact your radio module supplier to get the updated test results. You need to include the updated test results in your updated technical file.

2. Receiver Blocking Blocking Limits (
Blocking signal is now the same for all three receiver categories. Blocking signal level is also stronger. It is now -34dBm when it was earlier -47 or -53dBm depending on blocking signal frequency.

3. Transmitter limits for Spurious Emissions (
Frequency range has been changed. Transmitter limits for spurious emissions:

EN300 328 V2.1.1:
• 470 MHz to 862 MHz at -54dBm
• 862 MHz to 1 GHz at -36dBm

EN300 328 V2.2.2:
• 470 MHz to 694 MHz at -54dBm
• 694 MHz to 1 GHz at -36dBm