Check that the shunts are at the following
positions as shown in
Figure 1-1:
-
The redrivers are configured
to operate in Pin Mode (MODE pins tied to L0 using J1 header).
- RX_Detect state machine of all redrivers is enabled by leaving
J2 open.
- The redrivers are enabled (PWDN pins tied to GND using J4
header). Alternatively, for PCIe applications, the PWDN pins may be driven by
PCIe Present (PRSNT) signal by leaving J4 open and placing a shunt across pins 1
and 2 of J6.
- The board is configured for any PCIe bus width (PRSNT signal
controls set as shown in Figure 1-1 using J7, J8, J9 and J10 headers).
- DC Gain of all redrivers is set to 0 dB by leaving J14 open for
the downstream redrivers and by leaving J21 open for the upstream redrivers.
- EQ level of the RX CTLEs of all redrivers is set to 10 dB at 16
GHz by using J15 and J16 for the downstream redrivers and J22 and J23 for the
upstream redrivers.
- If necessary, adjust EQ levels of the downstream redrivers, or
upstream redrivers, or both, by arranging shunts on J15 and J16 for downstream
redrivers and J22 and J23 for the upstream redrivers.
- Plug the EVM into a PCIe x16 server motherboard slot. Ensure
the motherboard is powered down before installing the EVM or configured for
hot-plug operation.
- Install a compatible PCIe endpoint card into the straddle
connector of the EVM.
- Power-up the motherboard.