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Chapter 4 Test Results
Signal results
Data Communications and Diphase Testing Manual
Page 34 21148872, Rev. 002 January 2016
Signal results
Table 11 provides descriptions of the test results in the Signal category.
BERT results
Table 12 provides descriptions of the test results in the HS Datacom or Diphase BERT
category.
Table 11 Signal results
Test Result Description
Clock In Frequency Frequency derived from clock input connector.
Datacom only.
Clock Out Frequency Frequency derived from clock output connector.
Datacom only.
Rx Clock Losses Count of the number of instances where the receive
clock was lost for a duration exceeding that specified
as the clock loss threshold since starting or restarting
the test.
Rx Data Losses Count of the number of instances where receiver syn-
chronization was lost due to a loss of data after at least
one data transition occurred since starting or restarting
the test.
Rx Frequency Frequency derived from receiver clock counter.
Tx Clock Losses Count of the number of instances where the transmit
clock was lost for a duration exceeding that specified
as the clock loss threshold since starting or restarting
the test.
Tx Frequency Frequency derived from transmission clock counter.
Table 12 BERT results
Test Result Description
Bit Error Rate Ratio of bit errors to received pattern data bits.
Bit Errors Number of received bits with a value opposite that
of the corresponding transmitted bits, after pattern
synchronization has been achieved.
Block Error Rate Ratio of block errors to the number of blocks ana-
lyzed.
Block Errors Number of block errors received after pattern syn-
chronization has been achieved.
Character Errors Number of characters received since test restart
that contain one or more data errors.
NOTE: This result is only available if you are test-
ing in asynchronous mode.