Setup procedures (part 1)
5-4 9390 Reference manual
The default sounding signal length is the minimum setting
(under five seconds). The maximum setting is 100 seconds.
Bit Error Rate (BER) Threshold (ALE option 5)
This ALE option sets the value of the BER Threshold used in
BER testing.
You can set a value in the range 0–48.
BER testing is a method of error detection for ALE word
transmission. ALE stations send and receive ALE link
controlling information in blocks of data called ALE words.
An ALE word consists of a 3-bit preamble and a 21-bit data
field.
The result of BER error testing is used in helping to decide
whether the ALE link can be established using the current
channel.
The higher the BER value of a transmitted ALE word, the
greater the error. A BER value of 0 indicates perfect
reception of an ALE word. The maximum BER value of 48
indicates that all bits of the ALE word were bad.
If a received ALE word contains more errors than the BER
Threshold, the ALE controller rejects the word. The lower
you set the BER Threshold, the tougher the test for rejecting
transmission errors.
Golay Threshold (ALE option 6)
This ALE option sets the value of the Golay Threshold used
in Golay testing.
You can set a value in the range 0–4.
Golay testing is an additional method of error detection for
ALE word transmission. The result of Golay error testing is
used in helping to decide whether the ALE link can be
established using the selected channel.
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