To Set The 10Base-T Configuration Switches - HP E3473A User Manual

Connecting to the Host Computer

To set the 10BASE-T configuration switches

To set the 10BASE-T configuration switches
Set switches S7 and S8 to CLOSED unless one of the following conditions is
true:
•
If the LAN cable exceeds the standard length, set switch S7 to OPEN.
The HP E3472A/73A Emulator has a switch-selectable, twisted-pair receiver
threshold. With switch S7 set to OPEN, 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:
•
•
When switch S7 is set to CLOSED, 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 HP E3472A/73A Emulator is connected to a non 10BASE-T
network set this switch to LINK BEAT OFF (0 or OPEN).
In normal mode (switch S8 set to CLOSED), 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 Emulator is used on a non
10BASE-T network set this switch to LINK BEAT OFF (OPEN).
N o t e
Setting switch S8 to OPEN when Link Beat integrity checking is required by
your network will cause the remote MAU to disable communications.
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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.