13
▪
Clock rate can vary from 50 MHz to (525/710) MHz, with an amplitude range from 0.05
to 1.5 Vpp
▪
Typically, this will be rate / 16, 64, or 80, but can be any other rate as well
▪
Enter the
Pattern Length
of the data feeding the DSO to capture the full pattern
Note:
Incorrect pattern length would still display the eye capture, however full pattern
capture is required for certain features of the software such as Jitter Decomposition,
PTB and Filters.
E.G.: Pattern Length = 127 for PRBS-7, The Pattern length of PN(n) is (2^
n
) - 1.
▪
To get wander correction, check the box then choose between the 3 frequencies, 1024
or 2048 or 4096 Hz
▪
In order to retrieve the last configuration, enter the specified IP and then press the
refresh button
▪
In order to scale the measured results, to remove the effect of an attenuator
connected at the receiving end of the scope, enter the Attenuation value in dB. In
optical mode, the value is doubled when the attenuator is at 3 dB. In electrical mode
this is 6 dB.
▪
To capture more points for finer measurements, accumulate the number of points
from all the acquisitions by entering the total number of points to persist in the
accumulate field. This will set the number of points filling the entire eye diagram. For
both UI’s
, half this number of points will be displayed in the pattern diagram.
Accumulation works in infinite persistence mode, and unless the points are cleared or
the connection is reset, all acquisitions will take part in the accumulated result with
equal amounts of points randomly selected from each acquisition.
AOP Offset Correction
This field enables ML4015D users to offset (or shift) the actual power values reported from
the photocurrent of the photodiode power supply which represents the actual AOP of the
DUT signal with a reading resolution of 16 bits.
Attenuator Compensation
This field is specifically relevant to legacy platforms like the
ML4005D
and
ML4005C
, where
the average of the captured 1 and 0 levels is used to determine the DUT measurement. These
legacy systems featured a DC coupled O/E.