Crocus SHDSL G703.pdf - FTP Directory Listing
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36 Crocus SHDSL G703 Chapter 3 User manual DIP switches and straps of the Crocus SHDSL G703 3.1.2 DIP switches of the TT The following table gives an overview of DIP switch bank DS1 of the TT: DIP switch name DS1 no. Setting Function loader mode 1 on Normal operation. off Start up in loader mode. load default configuration 2 on Normal operation. off Load default configuration. For more information on … • DIP switch and strap location on the TT motherboard, refer to 3.1.1 - The TTmotherboard on page 35. • changing DIP switch and strap settings on the TT, refer to 3.1.4 - Changing DIP switch and strap settings of the TT on page 39.
Crocus SHDSL G703 Chapter 3 37 User manual DIP switches and straps of the Crocus SHDSL G703 3.1.3 Straps of the TT Strap ST1 Using strap ST1 you can configure the interconnection between signal ground and protective ground (earth): ST1 strap position Connection Description 1-2 disconnected (default) 2-3 directly connected By default, the signal ground is disconnected from the earth. This avoids problems which might occur when the earth potential of the Crocus SHDSL G703 and the connected application is not the same. In such a situation earth current loops may induce distortion on the transmitted data, resulting in transmission errors. Sometimes it is not possible to connect the application directly to the earth. In that case you can earth the application through the Crocus Crocus SHDSL G703 by connecting the Crocus SHDSL G703 to the earth and setting strap ST1.Also the opposite situation might occur: it is not possible to earth the Crocus SHDSL G703. In that case you can earth the Crocus SHDSL G703 through the application by connecting the application to the earth and setting strap ST1. Straps ST3, ST4 and ST5 Using straps ST3, ST4 and ST5 you can … • select which connector you want to use: the RJ45 connector or the BNC connectors. • choose whether the shield of the TX-IN BNC connector is connected to the PGN or not. Function ST3 strap position ST4 strap position ST5 strap position RJ45 (default) 2-3 2-3 2-3 BNC with TX-IN shield connected to PGND 1-2 1-2 1-2 BNC with TX-IN shield isolated from PGND (default) 1-2 1-2 2-3 For more information on … • DIP switch and strap location on the Crocus SHDSL G703 motherboard, refer to 3.1.1 - The TTmotherboard on page 35.
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<strong>Crocus</strong> <strong>SHDSL</strong> G703 Chapter 3 37<br />
User manual<br />
DIP switches and straps of the <strong>Crocus</strong> <strong>SHDSL</strong> G703<br />
3.1.3 Straps of the TT<br />
Strap ST1<br />
Using strap ST1 you can configure the interconnection between signal ground and protective ground<br />
(earth):<br />
ST1 strap position<br />
Connection<br />
Description<br />
1-2 disconnected<br />
(default)<br />
2-3 directly connected<br />
By default, the signal ground is disconnected from the earth.<br />
This avoids problems which might occur when the earth potential<br />
of the <strong>Crocus</strong> <strong>SHDSL</strong> G703 and the connected application<br />
is not the same. In such a situation earth current loops may<br />
induce distortion on the transmitted data, resulting in transmission<br />
errors.<br />
Sometimes it is not possible to connect the application directly<br />
to the earth. In that case you can earth the application through<br />
the <strong>Crocus</strong> <strong>Crocus</strong> <strong>SHDSL</strong> G703 by connecting the <strong>Crocus</strong><br />
<strong>SHDSL</strong> G703 to the earth and setting strap ST1.Also the opposite<br />
situation might occur: it is not possible to earth the <strong>Crocus</strong><br />
<strong>SHDSL</strong> G703. In that case you can earth the <strong>Crocus</strong> <strong>SHDSL</strong><br />
G703 through the application by connecting the application to<br />
the earth and setting strap ST1.<br />
Straps ST3, ST4 and ST5<br />
Using straps ST3, ST4 and ST5 you can …<br />
• select which connector you want to use: the RJ45 connector or the BNC connectors.<br />
• choose whether the shield of the TX-IN BNC connector is connected to the PGN or not.<br />
Function ST3 strap position ST4 strap position ST5 strap position<br />
RJ45 (default) 2-3 2-3 2-3<br />
BNC with TX-IN shield<br />
connected to PGND<br />
1-2 1-2 1-2<br />
BNC with TX-IN shield<br />
isolated from PGND<br />
(default)<br />
1-2 1-2 2-3<br />
For more information on …<br />
• DIP switch and strap location on the <strong>Crocus</strong> <strong>SHDSL</strong> G703 motherboard, refer to 3.1.1 - The TTmotherboard<br />
on page 35.
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