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Receiver Minimum Input Level Sensitivity

Definition

Receiver minimum input level sensitivity is the minimum specified rf level of a WLAN signal that a WLAN receiver will receive and demodulate while maintaining a certain FER (802.11b) or PER (802.11a) at or below the specification called out in the IEEE standard.

Standards

  • IEEE Std 802.11b-1999 16 September 1999 Paragraph 18.4.8.1
  • IEEE Std 802.11a-1999 16 September 1999 Paragraph 17.3.10.1

Receiver minimum input level sensitivity image

Measurement Subtleties

802.11b - The FER shall be less than 0.08 at a PSDU length of 1024 octets for an input level of -76dBm measured at the antenna connector. The FER shall be specified for 11Mbps CCK Modulation.

802.11a - The PER shall be less than 10% at a PSDU length of 1000 bytes for rate-dependent input levels shall be the numbers listed in the table. The minimum input levels are measured at the antenna connector. See table.

Test Tools

The ESG signal generator with signal studio for WLAN creates a fully coded test signal, which enables receiver BER and FER to be performed, which is needed to test the receiver minimum input level sensitivity. The ESG does not perform WLAN BER/FER measurements on its own. You will need to capture the received payload and compare it to the payload data that was transmitted.

Documents & Downloads

RF Testing of Wireless LAN Products - Application Note (AN1380-1) 
This Application Note discusses the modulation technology behind several wireless LAN standards and the measurement techniques that can be used to trouble shoot and quantify their RF performance.

Application Note 2007-01-10

IEEE 802.11 Wireless LAN PHY Layer (RF) Operation and Measurement 
This Application Note is written for people who need to get an overall understanding of the configuration and testing of WLAN devices. It gives a brief description of a Wireless LAN system with emphasis on the radio or physical layer.

Application Note 2002-04-15