User`s guide

40 CPU32 Emulation
Chapter 2: Connecting the Emulation Probe to a LAN
Connecting the Emulation Probe to a LAN
To set the 10BASE-T configuration switches
Set switches S7 and S8 to ON unless one of the following conditions is
true:
•
If the LAN cable exceeds the standard length, set switch S7 to
OFF.
The emulation probe has a switch-selectable, twisted-pair receiver
threshold. With switch S7 set to OFF, the twisted-pair receiver
threshold is lowered by 4.5 dB. This should allow you to use cable
lengths of up to about 200 meters. If you use a long cable, you should
consult with your LAN cabling installer to ensure that:
• The device at the other end of the cable has long cable capability, and
• The cable is high-grade, low-crosstalk cable with crosstalk attenuation
of greater than 27.5 dB.
When switch S7 is set to ON, the LAN port operates at standard
10BASE-T levels. A maximum of 100 meters of UTP cable can be used.
•
If your network doesn’t support Link Beat integrity checking or if
the emulation probe is connected to a non 10BASE-T network
(such as StarLAN) set this switch to LINK BEAT OFF (0 or
OPEN).
In normal mode (switch S8 set to ON), a link integrity pulse is
transmitted every 15 milliseconds in the absence of transmitted data. It
expects to receive a similar pulse from the remote MAU. This is the
standard link integrity test for 10BASE-T networks. If your network
doesn’t support the Link Beat integrity checking or if the emulation
probe is used on a non 10BASE-T network (such as StarLAN) set this
switch to LINK BEAT OFF (OFF).
NOTE:
Setting switch S8 to OFF when Link Beat integrity checking is required by
your network will cause the remote MAU to disable communications.