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LV 2000
www.metrodata.co.uk
Metrodata LV2000
Ethernet LAN to EIA-644 LVDS
Converter Installation Guide
Metrodata Ltd
Fortune House
Crabtree Office Village
Eversley Way
Egham
Surrey TW20 8RY
United Kingdom
tel: +44 (0) 1784 744700
fax:+44 (0) 1784 744730
email: sales@metrodata.co.uk
Part No: 76-02-063B
website: www.metrodata.co.uk
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Summary of Contents for Metrodata LV2000
- Page 1 LV 2000 www.metrodata.co.uk Metrodata LV2000 Ethernet LAN to EIA-644 LVDS Converter Installation Guide Metrodata Ltd Fortune House Crabtree Office Village Eversley Way Egham Surrey TW20 8RY United Kingdom tel: +44 (0) 1784 744700 fax:+44 (0) 1784 744730 email: sales@metrodata.co.uk Part No: 76-02-063B...
- Page 2 1 INTRODUCTION 1. 1 About the LV2000 The Metrodata LV2000 is used to extend a LAN segment over an LVDS network connection, such as a satellite modem across a satellite link to a remote site. LAN data is adapted to a synchronous format using HDLC as a transport mechanism.
- Page 3 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.
- Page 4 200-100mA. The LV2000 must be connected to safety earth for correct operation. The LV2000 power supply should be connected to a supply socket that is physically located close to the LV2000 and is easily accessible. Safety Notes: Excessive voltages are present inside the unit. There are no user serviceable parts inside the unit, and the cover should not be removed by unqualified personnel.
- Page 5 LV2000 DESCRIPTION OF PARTS 2 LV2000 DESCRIPTION OF PARTS 2. 1 Rear panel All connections into and out of the LV2000 are made through the rear panel which is shown in schematic form for both AC and DC models below. Pin1...
- Page 6 Terminal Timing(B) ST(B) Send Timing(B) SD(B) Send Data(B) ST(A) Send Timing(A) RD(B) Receive Data(B) RT(A) Receive Timing(A) RS(B)* Request to Send (B) TT(A) Terminal Timing(A) Figure 2. 3 LV2000 DTE port D-type connector layout * optionally driven LVDS or LVTTL outputs...
- Page 7 MDI-X configurations. This removes the potential requirement for Crossover cables when connecting LANs to the LV2000 whatever LAN equipment is being used. The port also automatically negotiates the LAN speed and operates at either 10 Mbps or 100 Mbps, and negotiates whether operation should be in full or half duplex mode, providing that it is negotiating with another auto-negotiating port.
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Page 8: Installation And Setup
(2) This device must accept any interference received, including interference that may cause undesired operation. 4 5 6 7 8 17-08-637A Figure 3. 1 LV2000 Base Panel label 3 . 1. 1 Bit-switch definitions The default settings of the bit-switch are shown in bold: Bit-switch... - Page 9 Bit-switch ON: The Crypto Resynch function is DISABLED Bit-switch OFF: The Crypto Resynch function is ENABLED. when the LV2000 detects a loss of synch on the receive data, it will pulse the RS control signal for half a second and then wait for 5 seconds before checking for synchronisation again.
- Page 10 LV2000 unit is invalid. When synchronisation is lost, it is useful for the LV2000 to be able to detect this and automatically take action to resynchronise and restore the data link.
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Page 11: Optional Rackmounting
INSTALLATION & SET-UP 3. 4 Optional rackmounting Rackmounting kits may be used to mount two LV2000 units side by side in a 19” rack. The kit, Part no 80-05-256, has a recessed plate to permit cable or fibre bends to be made within the envelope of a 19”... - Page 12 LAN connection, and investigatory action should be taken on the LAN and/ or its cables. Note that for 100M Full Duplex operation between the LV2000 and a fixed (i.e. non- negotiating) LAN port, bit-switch 6 must be set to FULL (OFF state) and Bit-switch 7 must be set to 100M (OFF state).
- Page 13 86 KPa - 106 KPa Disclaimer Metrodata Ltd makes no representations or warranties with respect to the contents hereof and specifically dis- claims any implied warranties or merchantability or fitness for any particular purpose. Further, Metrodata Ltd reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Metrodata Ltd to notify any person of such revision or changes.
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