U4305B Datasheet, PDF (6/20 Pages) Keysight Technologies – Protocol Exerciser for PCI Express® 3.0

06 | Keysight | U4305B Protocol Exerciser for PCI Express^® 3.0 - Data Sheet
Power Management
Power is a critical component of every PCIe system today, and you need it to allow the
verification of the LTSSM power saving states. The U4305B enables you to emulate the
power management states of LTSSM. With support for both ASPM (Active State Power
Management) and PCI-PM (PCI Bus Power Management), the U4305B supports testing
to allow you to verify entry and exit to these link states.
Figure 5. L0s enter and recovery is the first step to reducing power consumption when recovery time
is critical. Additional power saving are available by using the L1 and L1 substates, but verification
of recovery is key. Other testing (NVMe emulation, data replay, traffic and error generation) can be
implemented while the power management settings continue to operate on the link as specified. Use
scripting to link together multiple operations to recreate your desired test scenario.
Figure 6. The scripting test bench includes example verification scripts of L1 substate tests.