E2688A Datasheet, PDF (6/10 Pages) Keysight Technologies – High-Speed Serial Data Analysis

06 | Keysight | E2688A, N5384A High-Speed Serial Data Analysis and Clock Recovery Software - Data Sheet
Serial data trigger and search
Powerful software triggering is available
for use on Infiniium oscilloscopes when
combined with the 8b/10b data decoding
function (that continuously scans for
the occurrence of up to 4 consecutive
symbols).
Setup the trigger based on symbols;
specific to a given standard. Invalid codes
or hex values. Solve data dependent
problems fast by using your oscilloscope
to monitor serial traffic and capture
error conditions. Unlike any other tool,
you can now combine logical errors with
the analog signal view of the serial data
stream at the time of the error occurrence.
Figure 9. Configuring a serial data trigger in the 8b/10b protocol.
Flexible clock recovery
You can choose constant-frequency, first-
order phase-locked loop (PLL), or second-
order PLL clock recovery. You can adjust
the center frequency and bandwidth,
and in the case of second-order PLL,
the damping factor. For PCI Express, the
clock recovery algorithm specified by the
PCI-SIG^® is provided. A specific clock
recovery algorithm is also available for
SATA, HDMI, MHL, DisplayPort, USB, PCI
Express, CEI, Fibre Channel, FlexRay, and
MIPI^® technologies. When you choose
PLL clock recovery, the clock recovery
algorithm requires some time at the start
of each record to lock to the data. This
interval cannot be viewed or analyzed.
The serial data wizard will indicate the
required time period for the clock recovery
algorithm to lock.
The first-order PLL
selection emulates a
first-order PLL
You enter the nominal
data rate and loop
bandwidth for the
clock recovery PLL
Figure 10. First-order PLL selections.
When you select second-order PLL,
you can enter a damping factor
in addition to nominal data rate
and loop bandwidth. You can also
choose between OJTF and JTF
Figure 11. Second-order PLL selections.