Model 458-3SLB (3-Slot Chassis)
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Note that the slot number designations begin with 1 at the top of the unit.
The image above shows the rear of the 458-3SLB with one line module installed (not included).
Note the letter “B” differentiates the 458-3SLB from the 458-3SLA. Three types of connectors are shown -
RS232, IEEE-488 and Ethernet. The Grounding Lug is located on the left side.
The built-in Control Module is used to configure a Line Module to a particular length via a pushbutton
keypad on the front of the unit. The user may also use the IEEE-488, RS-232 or Ethernet port for
control. When configured for IEEE-488, the Model 458-3SLB can be operated from an IEEE
Controller such as a PC equipped with an IEEE interface board. In RS-232 mode, the unit can be
connected to any RS-232 device (e.g., a terminal or PC) that has a terminal emulation program such
as Hyper Terminal installed. In RS-232/Ethernet mode, RS-232 commands are sent over an Ethernet
connection. This allows a remote PC connected to a LAN to communicate with the 458-3SLB via RS-
232 commands. The 458-3SLB system can only be used in a controlled electromagnetic
environment.
In order to send RS-232 commands over an Ethernet connection, this feature must be
enabled. Refer to section
6.0 Enabling RS-232/Ethernet Control
for detailed
instructions.
Line Module Series
A maximum of three Model 458 Line Modules (sold separately) can be placed into the chassis. Each
458 Line Module can be individually set by the Control Module. Communications between the Control
Module and the 458 Line Module are via a backplane. The backplane will pass power and the signals
to control the length of each card. The RJ-45 connectors used to connect to the unit to be tested are
mounted directly on the 458 Line Module. Telebyte provides GUI software for a user-friendly interface
when configuring 458 Line Modules (available for download from our Web site at
www.telebytebroadband.com). Refer to the individual documentation for more information on our Line
Module series.
