Chapter 5 331
Programming Fundamentals
Using the LAN to Control the Instrument
Programming Fundamentals
This cable can be used to cascade hubs or to make point-to-point
connections without a LAN hub.
NOTE A convenient way to make a cross-over adapter is to use two RJ-45 jacks
wired according to Table 5-4, above. Standard straight-through patch
cables can then be used from the instrument to the adapter, and from
the adapter to other LAN devices. If you use a special-purpose adapter,
you will avoid having a cross-over cable mistaken for a standard,
straight-through patch cable.
NOTE Some commercially-available cross-over cables do not implement the
cross-over wiring required for your instrument. Please refer to
Table 5-4, above, and verify all connections before using cables not
made by Agilent Technologies.
Table 5-4 Cross-Over Cable (Unshielded-twisted-pair (UTP) cable with RJ-45
connectors)
Cross-Over Wiring
a
Connector A Connector B
Signal Name RJ-45 Pin # RJ-45 Pin # Signal Name
RX+ 1 3 TX+
RX- 2 6 TX-
TX+ 3 1 RX+
TX- 6 2 RX-
Not
Used
44Not
Used
55
77
88
a. Either end of this cable can be used at the instrument or
LAN device. The connector names are a convention use-
ful during cable construction only.
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