Intel
®
Ethernet Network Adapter E810-CQDA2T
User Guide
70 722960-002
5. Run synce4l (optional):
#./synce4l -f configs/synce4l.cfg -m
Note: Refer to Section 5.10, “Example synce4l Configuration File for BC”.
Note: For GM mode, ensure that input_mode = external is used in the config file.
Note: As the default DPLL priority for 1PPS from the SMA is higher than the recover clock's
priority.
6.2.2 Follower Adapter
Before proceeding, configure the GNSS to the output 1PPS signal and connect it to the SMA1 connector
(or to U.FL2). Set all SMA and U.FL connectors to off (see Section 4.0).
1. Set interface device:
# export ETH=`grep 000f /sys/class/net/*/device/subsystem_device | awk -F"/"
'{print $5}' | head -n 1
2. SMA2 as output:
# echo 2 2 > /sys/class/net/$ETH/device/ptp/ptp*/pins/SMA2
3. Set periodic output on SDP20 and SDP22 (To synchronize the DPLL1 to the E810 PHC synced by
ptp4l):
# echo 1 0 0 0 100 > /sys/class/net/$ETH/device/ptp/ptp*/period
# echo 2 0 0 1 0 > /sys/class/net/$ETH/device/ptp/ptp*/period
Note: As a side effect of having a very accurate DPLL, synchronization between the two
E810-CQDA2T adapters can take up to several hours to change to a locked state.
4. Run ptp4l:
# ifconfig <network_interface_port0> 192.168.2.2
# ./ptp4l -i <network_interface_port0> -m -s
5. Run synce4l (optional):
#./synce4l -f configs/synce4l.cfg -m
Note: Refer to Section 5.10, “Example synce4l Configuration File for BC”.
Note: For GM mode, ensure that input_mode = external is used in the config file.
Note: As the default DPLL priority for 1PPS from the SMA is higher than the recover clock's
priority.
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