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INSTALLATION & SET-UP

  8

3 . 1. 2 Crypto Resynch

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.

3 . 1. 3 Resynch Mode

Bit-switch ON: Normal Sate of Resynch control is High (Bit-switch in ON position). Resynch 
pulse will be Low (OFF) when ENABLED.

Bit-switch OFF: Normal Sate of Resynch control is Low (Bit-switch in OFF post ion). Resynch 
pulse will be High (ON) when ENABLED.

Note: 

The above High/Low states refer to the A signal of a differential pair.

3 . 1. 4 Resynch Control

Bit-switch ON: The Resynch control will be differential LVDS.
Bit-switch OFF: The Resynch control will be single ended LVTTL

3 . 1. 5 Data Invert

Bit-switch ON: Normal operation. 
Bit-switch OFF: The data is inverted.

3 . 1. 6 Duplex

Bit-switch ON: LAN port operates Half Duplex in manual mode, ignored in Auto-Negotiate 
mode. 
Bit-switch OFF: LAN port operates Full Duplex in manual mode, ignored in Auto-Negotiate 
mode. 

3 . 1. 7  Speed

Bit-switch ON: LAN port operates at 10Mbps in manual mode, ignored in Auto-Negotiate 
mode. 
Bit-switch OFF: LAN port operates 100Mbps in manual mode, ignored in Auto-Negotiate 
mode. 

3 . 1. 8 Auto Negotiation

Bit-switch ON: LAN port Auto Negotiates for Speed and Duplex. 
Bit-switch OFF: LAN port uses manual settings for Speed and Duplex. 

Note:

 The IEEE802.3 Auto-Negotiation standard allows for operation with ports that support 

either Auto-Negotiation or a fixed configuration. Note that when operating with a fixed 
configuration port, the Auto negotiation function can ONLY detect the speed of the link. The 
fixed link will always be assumed to be half duplex.

Summary of Contents for 80-05-558

Page 1: ...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 Metrodata LV2000 Ethernet LAN to EIA 644 L...

Page 2: ...to the LAN port If the FCS is incorrect the packet is discarded The LV2000 has an auto negotiating 10 100BaseT Ethernet port and an EIA 644 LVDS DTE port for LVDS connection mounted on the rear panel...

Page 3: ...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...

Page 4: ...red using leaded solder 1 7 Power Supply The LV2000 is powered by an internal mains fed power supply The input voltage is 100 250VAC 50 60Hz with an input current of 50 mA An alternative unit fitted w...

Page 5: ...ed unit is available The input voltage and current ranges are minus 36 to minus 72 volts DC 200 100mA A Buccaneer type socket is fitted to the rear panel and a plug is provided with the unit for the c...

Page 6: ...riven LVDS or LVTTL outputs Pin Direction Signal name 1 2 SD A Send Data A 3 RD A Receive Data A 4 RS A Request to Send A 5 6 7 Ground Signal Ground 8 RR A Receiver Ready A 9 RT B Receive Timing B 10...

Page 7: ...tly selects half duplex operation Such operation is prone to errors and should be avoided by setting AUTONEGOTIATION to DISABLED and manually selecting the correct SPEED and DUPLEX mode of operation u...

Page 8: ...ONVERTER AC LV2000 For product manual and other information Metrodata Ltd TW20 8RY UK Tel 44 0 1784 744700 Fax 44 0 1784 744730 17 08 637A Part No 80 05 558 OFF ON www metrodata co uk Manufactured in...

Page 9: ...esynch control will be single ended LVTTL 3 1 5 Data Invert Bit switch ON Normal operation Bit switch OFF The data is inverted 3 1 6 Duplex Bit switch ON LAN port operates Half Duplex in manual mode i...

Page 10: ...o either High or Low to initiate Resynch action When Crypto resynch is DIASABLED the RS output will assume the normal High ON state In addition in order to support the widest range of Crypto equipment...

Page 11: ...adaptor plate using the screws that you have removed as shown in the illustrations below Then secure the rack mounting plate complete with the two LV2000 units to the 19 rack using the locating holes...

Page 12: ...then there is a LAN connection If the LED remains unlit there is no LAN connection and investigatory action should be taken on the LAN and or its cables Note that for 100M Full Duplex operation betwee...

Page 13: ...options LVDS port DCE supplied clock Line Rate LVDS 52Mbps Max packet rate 93913 64 byte packets per second full duplex at 52 Mbps LED Indicators DTE Tx and Rx Activity LAN Speed Activity Alarms Loopb...

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