Teledyne LeCroy PeRT3 Eagle Systems - Manual (Page 36)

Version 1.6 PeRT 3 Eagle User Manual
32
LeCroy Corporation
count than the equivalent time period. In the event the device totally
loses signal lock and stops transmitting, the test case will eventually
time out even if the maximum bit count is never achieved.
Elapsed Time If Elapsed Time is selected, the test will continue for the time
specified, then terminate.
PASS/FAIL If PASS/FAIL Confidence is
Confidence selected, the test will continue
until the numbers of errors
encountered combined with the
number of bits processed
exceeds a specified confidence
level that the receiver is
passing or is failing the test.
The criterion required
(maximum error ratio) is
specified in the Pass/Fail BER
(bit error ratio) field, and the desired confidence level is specified in the
%Confidence field. Note that when this selection is made, the actual
length in time of the test may vary significantly from test to test, since
the actual number of errors encountered will affect the number of bits
which need to be processed to obtain the desired confidence level that
the specification has been met (or has been failed).
Time or If Time or Max Errors is selected, the test will continue until either the
Max Errors time specified is reached or the maximum numbers of errors is
exceeded, whichever occurs first.
Time or If Time or PASS/FAIL is selected, the test will continue until either the
PASS/FAIL time specified is reached or the Pass/Fail BER is achieved with the
specified confidence level, whichever occurs first.
Find BER Curve If Find BER Curve is selected,
the system will performed an
automated jitter tolerance test
using a single variable (e.g., HF
SJ Amplitude). You can specify
the PASS/FAIL BER to be
used, and the parameter to be
scanned. The system will then
automatically scan through the
settings of the specified jitter
parameter to identify the
maximum setting that the DUT can tolerate without exceeding the
BER threshold specified.
Other Channel If Other Channel is selected, the test will run on the specified channel
until the tests on the other channels that are currently running
terminate. Typically you would select this option when doing
"victim/aggressor" testing and you want to send a specific pattern on
the "aggressor" channels while testing the effects of cross-talk on the