R&S RTO6 - 13.19 Ethernet 1000 BASE-T1 (option R&S RTO6-K560); 13.19.1 1000 BASE-T1 basics

Protocol analysis
R&S
®
RTO6
794User Manual 1801.6687.02 ─ 05
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13.19 Ethernet 1000BASE-T1 (option R&S RTO6-K560)
1000BASE-T1 is a single pair Ethernet based protocol specialized for the needs of the
automotive industry, such as in the automotive networking applications, enabling
advanced safety, comfort and infotainment features within the automobile. Its specifica-
tions is reference to IEEE P802.3bp.
● 1000BASE-T1 basics............................................................................................794
● 1000BASE-T1 configuration..................................................................................795
● 1000BASE-T1 trigger............................................................................................798
● 1000BASE-T1 decode results...............................................................................804
● Search on decoded 1000BASE-T1 data...............................................................806
13.19.1 1000BASE-T1 basics
The 1000BASE-T1 has the following objectives:
●
Provides a PHY that supports full duplex operating at 1000 Mbps over a pair of
unshielded sheathed twisted-pair cable or better cable.
●
Achieves bit error rate (BER) of less than 1e
-10
.
●
Support for up to at least 15 meters of cable length in the automotive link segment.
To achieve the above objectives, 1000BASE-T1 uses Physical Coding Sublayer (PCS)
and Physical Medium Attachment (PMA) sublayer as follows:
●
Adopts full duplex communication of 1000BASE-T1 and therefore echo cancella-
tion on a single twisted-pair channel. This feature reduces cabling while preserving
the Ethernet MAC compatibility
●
Adopts Pulse Amplitude Modulation (PAM-3) encoding scheme with the following
encoding techniques:
– PAM-3 is transmitted at 750 MB data rate.
– It uses 15-bit scrambler to improve the EMC performance.
– Data is encoded in 80B/81B blocks.
– 396 bits of Reed-Solomon forward error correction (FEC) parity is added to
each group of 45 80B/81B blocks.
– 9-bit OAM symbol is added, then 396 bits Reed-Solomon. Together, they shape
a PHY frame of 4050 bits, or 450 forward error correction (FEC) symbols of 9
bits. FEC allows for correction of up to 22 FEC symbols per PHY frame.
Ethernet 1000BASE-T1 (option R&S R
T
O6-K560)