[SI-LIST] LVDS Transmission Problem
- From: "Baris Duzgun" <bduzgun@xxxxxxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Tue, 27 Sep 2005 15:32:48 +0300
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From: "Baris Duzgun" <bduzgun@xxxxxxxxxxxxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Subject: LVDS Transmission Problem
Date: Tue, 27 Sep 2005 15:32:48 +0300
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Hi
We have a system which is build up two subsytem. Data signals between the
subsystems are in LVDS format. Between these two subsystems there is 10m
cable. LVDS data signals are carried using shielded twisted pair cables.
Inside these two subsystem LVDS signals also passed through backplanes and
flexes . We use national LVDS transmitter and receiver. (DS90LV032ATM &
DS90LV031ATM) . The data rate of the LVDS signals are 34MHz. The problem is
for some data patterns the transmitted and received data is not same? As
the cable length is shortened to 3m and frequency of LVDS signals is
reduced the problem somewhat lowered but we have still the problem. What
could be the reasons for this problem?
<mailto:r@xxxxxxxxxxxxxxxxxxx>
M.Baris DUZGUN
Hardware Senior Expert Engineer
ASELSAN INC. MGEO Division
P.K. 30 06011
Etlik ANKARA
TURKEY
Tel : +90 312 847 53 00 / 4534
Fax : +90 312 847 53 20
e-mail : bduzgun@xxxxxxxxxxxxxxxxxxx <mailto:bduzgunr@xxxxxxxxxxxxxxxxxxx>
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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hi <o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>We have a system which is build up two subsytem. Data =
signals
between the subsystems are in LVDS format. Between these two subsystems =
there
is 10m cable. LVDS data signals are carried using shielded twisted pair =
cables.
Inside these two subsystem LVDS signals also passed through backplanes =
and flexes
. We use national LVDS transmitter and receiver. (DS90LV032ATM &
DS90LV031ATM) . The data rate of the LVDS signals are 34MHz. The problem =
is for
some data patterns the transmitted and received data is not same? =
As the cable
length is shortened to 3m and frequency of LVDS signals is reduced the =
problem
somewhat lowered but we have still the problem. What could be the =
reasons for
this problem?<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'><a =
href=3D"mailto:r@xxxxxxxxxxxxxxxxxxx";
title=3D"mailto:serdar@xxxxxxxxxxxxxxxxxxx";></a><o:p></o:p></span></font>=
</p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>M.Baris =
DUZGUN<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>Hardware Senior =
Expert Engineer<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>ASELSAN INC. MGEO =
Division<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>P.K. 30 =
06011<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>Etlik =
ANKARA<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>TURKEY<o:p></o:p></span></font></p>=
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>Tel : +90 312 847 53 00 / =
4534<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>Fax : +90 312 847 53 =
20<o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 color=3Dnavy face=3D"Times New =
Roman"><span
style=3D'font-size:12.0pt;color:navy'>e-mail : <a
href=3D"mailto:bduzgunr@xxxxxxxxxxxxxxxxxxx";
title=3D"mailto:serdar@xxxxxxxxxxxxxxxxxxx";>bduzgun@xxxxxxxxxxxxxxxxxxx</=
a></span></font><font
size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
<p class=3DMsoNormal><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:
12.0pt'><o:p> </o:p></span></font></p>
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