INTRODUCTION
2
The LAN interface supports VLAN tagged frames and will forward frames sized up to 1536
bytes. Frames longer than this are discarded.
There is usually an LV2000 at each end of the link, and maximum efficiency is achieved by
not transmitting the 4 byte FCS field of the MAC frame end to end, but recalculating it before
transmission at the far end.
The theoretical maximum performance of the LV2000 at standard network speeds is given
below. Note that a variable number of flags are set between frames, depending on the line
speed.
Figure 1. 2 Performance of LV2000
1. 2 Safety
The LV2000 should not be connected to cabling which would be required by BS6701 to be
equipped with over-voltage protection. The following ports are designated SELV (Safety
Extra Low Voltage) within the scope of EN41003:
10/100 BaseT Ethernet port
EIA-644 LVDS DTE port (maximum speed 52 Mbps)
These ports should only be connected to SELV ports on other equipment in accordance with
EN60950 clause 2.3.
1. 3 Electromagnetic Compatibility
In order to ensure EMC compliance all signal and data cables and connectors must use a
screened connector shell with a screened cable. The cable screen must be terminated to the
screened connector shell and not connected to any pins of the connector. Failure to use the
correct connector may compromise EMC compliance.
1. 4 EN55022 Declaration
The LV2000 is a Class A product. In a domestic environment it may cause radio interference
in which case the user may be required to take adequate measures.
1. 5 FCC Declaration
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at its own expense.
Data rate
Mbps
Flags between
frames
Performance
without FCS in
pkts/sec
51.840
7
93913
