User manual

Chapter 7. Test Menu
7-6 TDU 120e User Manual 61202156L1-1
Pattern Result
Displays the results of the test currently active. The process of
leaving and returning to this menu item does not interrupt
the test.
Pressing
2
injects errors into the test pattern. These errors are
detected by the device performing the pattern check.
ES
The number of seconds with at least 1 bit error.
BES
The number of seconds with more than 1 bit error and less
than 320.
SES
The number of seconds with more than 320 bit errors.
*SYNC
Indicates if pattern sync is (yes) or is not (no) valid. The aster-
isk (*) indicates if pattern sync has been lost since the start of
testing.
Clear results by pressing
C
. The results are accumulated until
the test pattern is set to N
ONE
or C
LEARED
.
Using TST DS0s for testing can be very useful, particularly in
Fractional T1 applications.