Sercel Inc LRU ユーザーズマニュアル
LRU User Manual
1-1
General
The LRU (Line Remote Unit) relay is a long range point-to-point radio
relay cell that can be inserted anywhere in a spread as an element of the
408UL network to relay the data transmission on a Line or a Transverse.
It connects to any type of 408UL field electronics (LAUX, LAUL, FDU
Link, etc.). Built in the LRU is a full performance LAUX.
relay cell that can be inserted anywhere in a spread as an element of the
408UL network to relay the data transmission on a Line or a Transverse.
It connects to any type of 408UL field electronics (LAUX, LAUL, FDU
Link, etc.). Built in the LRU is a full performance LAUX.
In the LRU transmission protocol (Half-duplex), time is shared between
transmission of Master-to-Slave messages and transmission of Slave-
to-Master messages.
transmission of Master-to-Slave messages and transmission of Slave-
to-Master messages.
Master-to-Slave messages are called Network Control Sequences
(NCS), used for synchronization, zero-time transmission and control.
(NCS), used for synchronization, zero-time transmission and control.
Slave-to-Master messages are called Data Transfer Sequences (DTS),
used for data retrieval, seismonitor and collecting test results.
used for data retrieval, seismonitor and collecting test results.