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Receiver Maximum Input Level
Definition
The receiver maximum input level specifies a maximum packet error rate (PER-802.11a), or frame error ratio (FER-802.11b), at the maximum specified signal input level to the receiver.
Standards
- IEEE Std 802.11b-1999 16 September 1999 Paragraph 18.4.8.2 Receiver maximum input level
- IEEE Std 802.11a-1999 16 September 1999 Paragraph 17.3.10.4 Receiver maximum input level
- ANSI/IEEE Std 802.11 First edition 1999-00-00 Paragraph 15.4.8.2 Receiver maximum input level
Measurement Subtleties
The PER/FER measurements are made by comparing the packets/frames sent to the packets/frames received.
For WLAN, packet error rate (PER) testing is more common than bit error ratio (BER), because it is easier to implement. The 802.11 standard defines the use of a 32-bit CRC that will detect erroneous packets. To determine PER, you can use a CRC mismatch counter, internal to many devices.
Test Tools
The E4438C vector signal generator, with signal studio for WLAN, creates a fully coded test signal that you can use for PER/FER testing. You can perform this test with the Keysight advanced design system (ADS) in conjunction with the Keysight 89600 and the E4438C.