Packet TEPacket TE
max|TE|: Absolute maximum value of the phase error
TE (Time error) represents the time difference calculated from timestamps in
IEEE1588.2 messages. 'N/A' is displayed when the messages from DUT have
not arrived or Network Master behaves as Master clock.
cTE1: Mean value of TE1
cTE4: Mean value of TE4
max|TE1|: Absolute maximum value of TE1
max|TE4|: Absolute maximum value of TE4
Terr: Time error between DUT and Network Master
Terr =
cTE1 + cTE4
=
(avg. Delay_Request OWD) − (avg. Sync OWD)
2 2
max|Terr|: Absolute maximum value of Terr
Terr(min): Mimimum value of Terr
Terr(max): Maximum value of Terr
The each formula is shown below.
cTE1 = −1 × (avg. Sync OWD) + Δms
cTE4 = (avg. Delay_Request OWD) − Δsm
max|TE1| =Greater absolute value of (−1 × (max. Sync OWD) + Δms)
and (−1 × (min. Sync) OWD + Δms)
max|TE4| =Greater absolute value of(max. Delay_Request OWD − Δsm)
and (min. Delay_Request OWD − Δsm)
max|Terr| = max|cTE1 + cTE4|/2
= max|(avg. Delay_Request OWD) - (avg. Sync OWD)|/2
Δms = Δsm = Ethernet cable delay
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