EDM01-33v1 DAG_7.5G4_Card_User_Guide
52
©2008 Endace Technology Ltd. Confidential - Version 1 - November 2008
Connector Pin-outs
Overview
DAG cards have an 8-pin RJ45 connector for time synchronization. The connector has two
bi-directional RS422 differential circuits, A and B. The Pulse Per Second (PPS) signal is
carried on circuit A, and the SERIAL packet is connected to the B circuit.
Pin Assignments
The 8-pin RJ45 connector pin assignments and plugs and sockets are shown below:
1.
Out PPS+
2.
Out PPS-
3.
In PPS+
4.
In
5.
In SERIAL-
6.
In PPS-
7.
Out
8.
Out SERIAL-
Normally, you connect the GPS input to the PPS (A) channel input (pins 3 and 6).
The DAG card can also output a synchronization pulse for use when synchronizing two
DAG cards (i.e. without a GPS input). The synchronization pulse is output on the Out PPS
channel (pins 1 and 2).
To connect two DAG cards, use a
DUCK crossover cable
(page ) to connect the two time
synchronization sockets.
DUCK Crossover cable
To synchronize two DAG cards together use a cable with RJ45 plugs and the following
wiring.
TX PPS+
1
3
RX PPS+
TX PPS-
2
6
RX PPS-
RX PPS+
3
1
TX PPS+
RX
4
7
TX
RX SERIAL-
5
8
TX SERIAL-
RX PPS-
6
2
TX PPS-
TX
7
4
RX
TX SERIAL-
8
5
RX SERIAL-
Note:
This wiring is the same as an Ethernet crossover cable (Gigabit crossover, All four
pairs crossed).
Summary of Contents for DAG 5.2X
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