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2) PTP as the Clock Source
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The lidar connects to a third-party PTP master to obtain the absolute time.
·
Users may configure the PTP settings, see Section 4.2 (Web Control – Settings).
·
Users may check the PTP signal status, see Section 4.1 (Web Control - Home).
·
The lidar does not output GPS Data Packets.
The absolute time is updated as follows.
PTP Status
Date & Time
(accurate to μs)
Description
Free Run
Virtual
Starts counting from a virtual UTC time (such as 2000-01-01 00:00:00), using the lidar's internal 1
Hz signal.
Tracking or
Locked
Synchronized
Extract the actual date and time from the PTP Master's messages.
Frozen
Drifting
Starts counting from the last synchronized time, using the lidar's internal 1 Hz signal.
Will gradually drift from the actual GPS time.
Notes
·
PTP is a Plug & Play protocol; the lidar works as a PTP slave device and requires no additional setup.
·
The timestamps and Date & Time fields in Point Cloud Data Packets strictly follow the PTP master device. Certain PTP master devices may
have a specified offset from the lidar's time output. Please verify the configuration and calibration of your PTP master device.
Summary of Contents for Pandar40M
Page 1: ...www hesaitech com HESAI Wechat Pandar40M 40 Channel Mechanical LiDAR User Manual...
Page 17: ...15 2 Setup 2 1 Mechanical Installation Figure 2 1 Front View Unit mm...
Page 18: ...16 Figure 2 2 Bottom View Unit mm...
Page 19: ...17 2 1 1 Quick Installation Figure 2 3 Quick Installation...
Page 20: ...18 2 1 2 Stable Installation Figure 2 4 Stable Installation...
Page 27: ...25 2 3 2 Connection Figure 2 10 Connection Box Connection with GPS...
Page 28: ...26 Figure 2 11 Connection Box Connection with PTP...
