Keysight Technologies U4301, User Manual

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3 Specifying the Connection Setup
22 Keysight U4301 PCIe Gen3 Analyzer User’s Guide
For each of the above probing types, different options are available in the Connection Setup tab
reflecting the data direction (upstream, downstream, or bidirectional). Upstream is the data direction
towards the root complex. Downstream is the data direction away from the root complex. Based on
your probing setup and the data capture direction in which you have configured the hardware setup,
you need to select an appropriate probing option in the Connection Setup tab.
U4321A Solid Slot Interposer Card
When used with a U4321A solid slot interposer card, one U4301A/B module can probe in the
upstream (x1-x16), downstream (x1-x16), or bidirectional (x1-x8) way.
If you need to probe in both upstream as well downstream directions with a x16 link width, you need
two U4301A/B Analyzer modules and a U4321A SSI card. To reflect such a hardware setup in the
Connection Setup tab of the Logic Analyzer application, you need to select U4321A Slot Interposer
Upstream as the probing option for one of the U4301A/B modules and U4321A Slot Interposer
Downstream as the probing option for the other U4301A/B module.
if you have connected the U4301A/B module hardware to the DUT using the U4321A Solid Slot
Interposer card in a x8 bidirectional setup, then you need to select the U4321 Slot Interposer Both
Dir x8 as the probing option.
U4322A Soft Touch Midbus 3.0 probe
The U4322A midbus 3.0 probes require footprints to be designed into the device under test. Each
probe requires its own footprint, and there are basically two variations:
• Bidirectional — where half the footprint pins are for the upstream data and the other half are for
the downstream data.
• Unidirectional — where all the pins on the footprint are for the data going in the same direction.
Reversed refers to optional lane reversal which is supported for upstream ports.
Based on how you have designed the footprint for the probe, you need to select an appropriate
probing option in the Connection Setup tab. For instance, if you have configured a x4 bidirectional
setup using a U4322A midbus probe, then you need to select U4322A Bidirectional Full as the
Footprint, 1 Bidirectional upto x8 as the Link type, and x4 as the Link Width in the Connection Setup
tab.
U4324A PCIe Gen 3 Flying Lead probe
When used with a U4324A Flying Lead probe, one U4301A/B module can probe in the upstream
(x1-x16), downstream (x1-x16), or bidirectional (x1-x8) way. For x1-x8 bidirectional link type, you can
use the U4324A Flying Lead probes in a straight or a swizzled configuration.
If you need to probe in both upstream as well downstream directions with a x16 link width, you need
two U4301A/B Analyzer modules and eight U4324A Flying Lead probes. To reflect such a hardware
setup in the Connection Setup tab of the Logic Analyzer application, you need to select the U4324A
Flying Lead Probe as the probing option and Unidirectional as the link type for both the U4301A/B
modules.
If you have connected the U4324A Flying Lead probes in a x1 to x8 bidirectional straight setup, then
you need to select the U4324A Flying Lead Probe as the probing option and Bidirectional as the link
type.
If you have set up a swizzled x1 to x8 bidirectional configuration using the U4324A Flying Lead
probes, then you need to select the U4324A Flying Lead Probe Bi Swizzled as the probing option and
Bidirectional as the link type.