LeCroy SDA - Page 349

SDA Operator’s Manual
SDA-OM-E Rev H 349
Control Values Description
Find Pattern Pressing this button searches the signal for a
repeating pattern and loads it into the
function when it is found. The Length (UI)
and Tx dens. controls are then updated.
Invert Pattern On/off Checking this box inverts the found pattern
bit by bit.
Bit rate The symbol rate of the signal under test. This
value must be entered by the user in order to
set the nominal UI.
Avg Wfm On/off Averages the N cycle plots measured on
successive acquisitions. This is especially
useful for removing random effects from
standard deviation plots.
Use PLL On/off Use the software golden PLL to generate the
reference clock for edge timing. This setting
is ignored when DDmean or DDsdev is
selected.
Cutoff Div. PLL cutoff divisor When the PLL is selected, this control sets
the loop bandwidth as a ratio of the bit rate
(loop BW = data rate/cutoff divisor).
Find Level When the level type is absolute, clicking this
control finds the mean signal level.
Clear Sweeps Pressing this button clears the sweeps that
have been accumulated in the averaging
mode.