How to Calculate the Block Error Rate

1. Conduct a BLER test. Determine the total number of blocks to be sent during the test, and write a script for the sending device to send the blocks of data. Upload the script to the device, and run it.

2. Obtain the total number of blocks sent, the number of NAKs received and the number of ACKs received by the sending device at the end of the BLER test. Verify that the total blocks sent is equal to the number of blocks you established in the script as an additional check that you created the script properly. Validate that the number of ACKs plus the number of NAKs equals the total number of blocks sent.

3. Divide the number of NAKs by the total number of blocks sent and multiply by 100 to get a percentage. For example, if 500 blocks of data are sent, 499 blocks return ACK and 1 block returns NAK, then the block error rate would be 1 / 500 = .002 * 100 = 0.2%.