Clock Configuration and Other Switch Settings
The source for the reference clock used by the analyzer to record PCI Express traffic is configurable according to below
table for SW2. Make sure clock source in Recording Options in the PCIe Protocol Analysis application is set to External.
Pushbutton SW4 allows the user to change the link width enabled on the interposer by pressing SW4 multiple times.
SW1: DUT Power LED Status
This switch connects the DUT power indication LEDs to the bus power. SW1 is located on the front of the interposer near SW2 and is
configurable according to table below:
SW2: Clock Source Control
Note:
Factory settings for all switches are ON.
Note:
Factory settings for all switches are ON.
SW3: Active Width Control Pushbutton
SW1: DUT Power LED Status on Interposer
Selection SW1
LED Connected (Default)
ON
LED Disconnected
OFF
SW2.1
SW2.2
Reference Clock Source for Downstream Analysis
ON
ON
Analyzer will be supplied with reference clock from the
Host System PCIe slot connector.
OFF
ON
Analyzer will be supplied with reference clock from
US_CLK MMCX connector.
ON
OFF
Analyzer will be supplied with reference clock from
DS_CLK MMCX connector.
OFF
OFF
No clocks are supplied to the analyzer.
SW2.3
SW2.4
Reference Clock Source for Upstream Analysis
ON
ON
Analyzer will be supplied with reference clock from the
Host System PCIe slot connector.
OFF
ON
Analyzer will be supplied with reference clock from
US_CLK MMCX connector.
ON
OFF
Analyzer will be supplied with reference clock from
DS_CLK MMCX connector.
OFF
OFF
No clocks are supplied to the analyzer.
Pushbutton SW3 is used to turn off the terminations and remove all loads on the unused interposer
receivers depending on the maximum number of lanes to be analyzed. Press the pushbutton switch
(SW3) to move to the next active width as indicated by the LEDs (next to the switch) on the interposer.
This is useful for devices that require terminations not to be present in order to train to a lower link width.
The Active Width can be also controlled from the PCIe Protocol Analysis.
Note:
Even though the Active Width may be lower than x16, it may be possible that the Signal Detect
LEDs for higher lanes are ON if those lanes are transmitting signal.
5
Note:
This switch connects the DUT power indication LEDs to the bus power.
