Anritsu MX183000A, Operation Manual, Page: 86 / 226

Chapter 4 Operation
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Table 4.6.2-1 JTOL Settings Items
Item Description
Detection
Unit Sets whether error rate or error count is used for pass/fail
judgment.
Error Rate: Judges using error rate.
Error Count: Judges using error bit count. (default)
Estimate:
Judges using error rate.
Measures jitter tolerance using the error rate determined from
the Direction Search setting such as 1E–6 as the target. The
measurement results from this process are used to estimate
the jitter tolerance for the value specified by BER for JTOL
Estimation.
Note:
A BER for a rate lower than the intermediate measurement
is estimated even using the Error Rate/Count Rate setting,
but estimation may not be possible for certain intermediate
results. Setting to Estimate allows BER to be estimated
reliably.
For details, refer to Section 4.7.3 “Jitter Tolerance
Estimate”.
Error Count/
Error Threshold
Sets the threshold for judgment using the judgment method
selected in Unit. The judgment will be Fail if the bit error
value exceeds the threshold.
When Unit is set to Error Rate:
1E–3 to E–12 1E–1 Step (Default: 1E–12)
When Unit is set to Error Count: 0 to 10000000/Step 1
(default: 2)
When Unit is set to Estimate: Cannot be changed.
BER for JTOL
Estimation
The error rate used for Estimate can be changed. The results
will be refreshed even if this value is changed after the Jitter
Tolerance Test.