Clock Selection
The source for the reference clock used by the analyzer to record PCI Express traffic is configurable according to below table. DIP
switches and tables for clock selection are located on the rear side of the interposer.
SW2: Clock Select
SW2: Clock Select
1
2
Port B
3
4
Port A
ON
ON
REFCLKA
ON
ON
REFCLKA
OFF
ON
US_CLK
OFF
ON
US_CLK
ON
OFF
DS_CLK
ON
OFF
DS_CLK
OFF
OFF
REFCLKB
OFF
OFF
REFCLKB
Note
: If using direct cable from Summit T48 refer only to table for Cable A for ports A and B.
Note:
All switches in the ON position for SW2 is the factory default.
REFCLKA
: Use the reference clock from Port A in the U.2 host connector.
US_CLK
: Use the reference clock from the corresponding MMCX connector.
DS_CLK
: Use the reference clock from the corresponding MMCX connector.
REFCLKB
: Use the reference clock from Port B in the U.2 host connector.
3
Connections
IMPORTANT:
If you plan to insert the interposer into a Chassis backplane you MUST fit the rails from a donor carrier to the interposer
before use to avoid
serious damage
to the interposer. Instructions for Modifying the HDD Carrier are in
Section 7
.
Perform the following steps to connect the Interposer (see the image below):
1.
Set the SW2 DIP switch to the desired positions to set the clock selection for Port A and Port B according to the table above
(see
Section “3” on page ii
2.
For best results, attach the interposer to a drive carrier (See
Section “7” on page iii
3.
Install the U.2 device under test (DUT) into the bay on the interposer as shown (will fit only 2.5” drives). Screw the drive to the bay to secure it.
4.
Connect the Summit T48 Analyzer (or other compatible Teledyne LeCroy analyzer) to the interposer using the analyzer Y cable (PE021UCA-X).
5.
Connect the analyzer to a host computer system using the USB port on the front panel of the Summit analyzer.
6.
If not already done, install the PCIe Protocol Analysis software on the host machine.
7.
Connect 12V DC using the AC adapter supplied with the interposer. (Make sure that the AC adapter is powered on).
8.
Power on the analyzer.
9.
Launch the PCIe Protocol Analysis application, setup the appropriate recording options and start a recording. For more information see the Summit
T4 PCI Express Multi-Lane Protocol Analyzer User Manual -> Host to DUT Settings -> Configurations: U2 x2, U2 x4, U3 x2, U3 x4.
10. Install the Interposer into the host system connector.
11. Power on the host machine.
12. Use the PCIe Protocol Analysis application to monitor, record and view PCI Express traffic passing through the U.2 Interposer.
Note
: For step 9, if testing for hot plug, run recording first from the PCIe Protocol Analysis software then install the interposer into the host system connector.
5
Switch Configurations
SW4:
This switch connects the DUT power Indication LED to the bus power. It is located near the DC In connector.
SW4: DUT Power Staus LEDs
ON
LED Connected (Default)
OFF
LED Disconnected
DUT Power LED Status on Interposer
Note:
This switch connects the DUT power indication LEDs to the bus power. In some
systems with Hot-Plug management the Power Indication LEDs on the interposer may
prevent the host system from turning ON bus power to the device, if this happens
disconnect the LEDs using SW4 to allow proper bus power operation.
4