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Form 080/01
User Manual
SD-24
TDR/Sampling Head
070–7052–02
This document applies for firmware version X.XX
and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to performing service.
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WARRANTY
! " " " ! ! " " ! ! "
" ! ! " " ! " ! " " " " " " ! " "
! " THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR
REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR
BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
SDĆ24 User Manual
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Connector Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Installing the Sampling Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Using the Sampling Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buttons and Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument/Sampling Head Interaction . . . . . . . . . . . . . . . . . . . . .
&$$%) (&$ * !%($ (&%* %# (&($$( %*( &$$%) 11
12
12
13
Adjusting Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
Stored Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loop Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
"+)*!% &&' !% Offset Null . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
"+)*!% )* +## TDR Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
19
21
22
Taking TDR Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
TDR Step Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
'(*!&% %*& &(* !(+!* '(*!&% %*& W & '(*!&% %*& % '% !(+!* )#!% &((*!&% Example: Taking TDR Measurements . . . . . . . . . . . . . . . . . . . . . .
%!% (*!+# %!*) &( Example: Differential and Common Mode TDR . . . . . . . . . . . . .
)+($%*) More About TDR Measurements . . . . . . . . . . . . . . . . . . . . . . . . . .
23
26
29
31
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39
i
ii
List of Figures
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iv
List of Tables
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v
vi
Introduction
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SDĆ24 User Manual
1
Introduction
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2
SDĆ24 User Manual
Safety
Terms in Manuals
Terms on Equipment
Symbols in Manuals
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SDĆ24 User Manual
3
Safety
Do Not Operate in Explosive Atmospheres
4
SDĆ24 User Manual
Electrostatic Discharge
CAUTION
SDĆ24 User Manual
5
Electrostatic Discharge
6
SDĆ24 User Manual
Connector Care
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SDĆ24 User Manual
7
Connector Care
8
SDĆ24 User Manual
Installing the Sampling Head
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Sampling Head
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Power Only Sampling
Head Compartments
Figure 2:ăSampling Head Compartments in an 11801B and a CSA 803A
SDĆ24 User Manual
9
Installing the Sampling Head
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10
SDĆ24 User Manual
Using the Sampling Head
Front Panel
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TDR ON Light (Red)
Bottom Channel
Figure 4:ăSampling Head Front Panel
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SDĆ24 User Manual
11
Using the Sampling Head
Connecting Signals
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12
SDĆ24 User Manual
Using the Sampling Head
Instrument/Sampling
Head Interaction
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SDĆ24 User Manual
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Using the Sampling Head
Commands From the Mainframe Front Panel
Sampling Head Fnc's
Selected Channel Smoothing TDR/TDT TDR Polarity
TDR Head D Delay Figure 5:ăThe Sampling Head Fnc's PopĆUp Menu
14
SDĆ24 User Manual
Using the Sampling Head
Programmer Interface Commands
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SDĆ24 User Manual
15
Using the Sampling Head
16
SDĆ24 User Manual
Adjusting Parameters
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SDĆ24 User Manual
17
Adjusting Parameters
Stored Parameters
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18
SDĆ24 User Manual
Adjusting Parameters
Loop Gain
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Excessive Loop Gain
Figure 6:ăDisplayed Trace with Three Loop Gain Settings
SDĆ24 User Manual
19
Adjusting Parameters
Adjusting Loop Gain
#% ' %& " %& ,#( " (&' ##$ " ('#!' , #% !"( , %#! ' "" (%, !"( ,#( $%% '#
(&' ##$ " !"( , ' %& " %& &# $%#) )-,-'*# '(% & '(% & $( ,#( % (&" '
%'#% &" #% &" "%'#% #('$(' '# (&' ##$ " #( "
&# (& ' )-,-'*# '(% ,#( % (&" ' '%% #('$(' # '
"&'%(!"' '# '%% " +'%" "%'#%
#( !' #"&% (&'" ' ##$ " *")% ,#( % &!$ " '% '' & $-'#-$ )# '& " '%"&'#"-&$ %'%&'&
'' % &(&'"' , %"' %#! ' $%)#(& '% " '& & ,#( "
(& ' '( &" '' ,#( *"' '# !&(% " '(%" # )'#%" &#
'' ,#( " & &!$ ")( ,
#% "&'%('#"& '# (&' ' ##$ " & ' "" (%, &'#"
" ,#(% "&'%(!"'& - #"'"& "#")# ' !!#%, '' &'#%& '*# ) (& #% ' ##$
" (&'!"' ' '#%, ( ' ) ( " ' (&% ) ( & *%
&(&& ' ' """ # '& &'#"
20
SDĆ24 User Manual
Adjusting Parameters
Offset Null
" ) ,- (.&& $.,-'(- +')/, .(0(- ) ,- -"- '2 *+,(#( -" ,'*&#(! " "#, $.,-'(- -#/&2 43+), -" ,'*&#(!
" ,) -"- '*&#-. #(*.- ,#!(& &#/+, ).-*.-
) ,- (.&& #, ()- $.,- )++-&2 ',.+'(-, -%( - -" '#( +'
0#&& #()++- " ,)&.- /)&-! /&., )+ (2 .+,)+, #,*&2 )(
-" -+ 0#&& &,) #()++-
Adjusting Offset Null
). ( $.,- ) ,- (.&& .-)'-#&&2 )+ '(.&&2 +)' -" ("(
.+2 '(. 2). *+ + -) $.,- ) ,- (.&& '(.&&2 ,.+ -) $.,-" &))* !#( #+,-
). ( $.,- ) ,- (.&& 2 -+'#(-#(! -" "((& #(*.- )((-)+ 0#-" W -+'#(-)+ ( $.,-#(! -" ) ,- (.&& 0#-" -" %() ,) -"- -"
#,*&2 4-+ #, ,- -) -" *),#-#)( )( -" ,+(
2). $.,- ) ,- (.&& '(.&&2 -" ) ,- (.&& ,--#(! #, /&# )(&2 )+ -"
.++(- ,--#(! ) -" ,'))-"#(! *+'-+ )( )+ ) )+ 1'*& # ,'))-"#(! #, ,- -) ) ( 2). $.,- ) ,- (.&& '(.&&2
( 2). -"( -.+( ,'))-"#(! )( -" ) ,- (.&& /&. '2 ()- /&#
)0/+ -" 5 +''+, -" ) ,- (.&& /&., )+ 0"( ,'))-"#(! #,
)( ( ) ,) # 2). "(! -" ,'))-"#(! ,--#(! -" )++- ) ,- (.&&
/&. #, **&#
)- -"- -" 5 ,-)+, ).+ ) ,- (.&& /&., -" -0) -)+2 .&/&., )+ 0"( ,'))-"#(! #, )( ( ,'))-"#(! #, ) ( -" -0) .,+
)(,-(-, )+ 0"( ,'))-"#(! #, )( ( ,'))-"#(! #, ) 2). $.,- ) ,- (.&& .-)'-#&&2 .,#(! -" ("( .+2 '(.
-" +#, ( +#, #(,-+.'(-, $.,- )-" ) ,- (.&&
/&., ,'))-"#(! )( ( ,'))-"#(! ) SDĆ24 User Manual
21
Adjusting Parameters
TDR Amplitude
* $ %# $%! #% # %% $ &$ (% % "&$% % % ) & !# # $&#%$ & &$% % !*
%& % $%!
$%! !%& $%% $ ) $% $$%' % %!#*
%&# '#% $ & $ & % % &$% %$ !#%# '#) %
& &$% % !%& &% %) # &) &$ %
&#) &
& &$% % $%! # %' # ! $%' ! #%) % %
&%!&% %#% ) W % !%& $ &$%
# % ! $%' # %' #!%% #% % $%!
$ $% ) % #
) & &$% % $%! &% %) &$ % &#)
& % $%#&% &$%$ % !%& # % % ! $%'* %'* $%!$
* %$ ' % #) %% $% #$ %( '&$ % % #)
&% '& % &$# '& # % !%& &$%% % # #%#$ ## %$ $% # # #% 22
SDĆ24 User Manual
Taking TDR Measurements
"#, ,-#(' ,+#, "(0 -( ., -" 2
-( )+ (+& -#& (&#'
+ %-(&-+1 &,.+&'-,
TDR Step Generation
(-" "''%, #' -" 2
&)%#'! "/ ,-) !'+-(+
0"#" !#/, (-" "''%, &,.+&'- )#%#-#, (. ' ., -"
(.-).-, ( (-" !'+-(+, -( )+ (+& # +'-#% ' (&&(' &( &,.+&'-,
" ,-) !'+-(+ #+.#-+1 (',#,-, .'&'-%%1 ( ' $.,-% .++',(.+ ' #( ,0#-" '#-#%%1 (+ -" ,-) -" #( ,0#-" #,
#, -( ('.- .++'- -( -" (.-).- "' -" #( ,0#-" ()', -"
,-) (.+, #!.+ ,#&)%# # #!+& ,"(0, -" ,0#-" ' -" .+2
+'- ,(.+
*.#,#-#(' (#'
W
&
Figure 7:ăStep Generator Simplified Schematic Diagram
., ( -" +"#--.+ ( -" ,-) !'+-(+ -" (.-).- /(%-! ( -"
,-) )', (' -" +,#,-' -( !+(.' ( -" /# .'+ -,- "
(%%(0#'! ,-#(', ,+# -" ()+-#(' 0#-" ,"(+- #+.#- ' ()' #+.#-
' W %(.
SDĆ24 User Manual
23
Taking TDR Measurements
Operation Into a Short Circuit
!'+ ' " &*' & "!('! ! ' &'# !%'"%
"('#(' & !'+ &"%' ' %&&'! '" %"(! & W ! ' "('#('
)"' & ! ' " &*' "#!& %)%&,& ##%!' %&&'! '"
%"(! ' ' $(&'"! #"!' ! ' ' !! "!!'"% & W
(& ' !'%! '% !'"! %&&'! & W ! ' "!!'"%
#! & W. )"' ' ' $(&'"! #"!' %&& '" '%!&'"! #%"#'& '" ' &"%' ! ' ) (!% '&' ! & !,
')+ %' '" ' $(&'"! #"!' !! ' '%!&'"! ' &#+ %" ' %&' '%!&'"! '" ' &"! '%!&'"! & ' #%"#,
'"! ' %" ' $(&'"! #"!' '" ' &"%' ! ' ) (!% '&'
! (% 250 mV
0V
Figure 8:ăStep Generator with a Shorted Output
Operation Into a 50 W Load
!'+ ' " &*' & "!('! ! ' &'# !%'"% "('#(' &
"!!' '" W " ' %&&'! '" %"(! ' ' $(&'"! #"!' &
W (& " ' !'%! W #! (%%!' &"(%
#& ' ' $(&'"! #"!'
0V
-250 mV
Figure 9:ăStep Generation with a 50 W Load
! ' " &*' "#!& %)%&,& ' %'(%! #' '" %"(! &
%"! ! ' $(&'"! #"!' %&& '" ' #!
"*& ' $(&'"! #"!' '" % ! ' (% 24
SDĆ24 User Manual
Taking TDR Measurements
Operation Into an Open Circuit
&","$$0 ,! "' +/",! "+ '&-,"& "& ,! +,( &*,'* '-,(-, "+
'(& ,! *+"+,& ,' *'-& , ,! )-"+","'& ('"&, "+ W -+ '
,! "&,*&$ W "%(& ! % -**&, +'-* ($+ %
, ,! )-"+","'& ('"&, + +,*,"& '&","'&
0V
-250 mV
-500 mV
Figure 10:ăStep Generation with an Open Circuit
!& ,! "' +/",! '(&+ *.*+1"+ ((*&, *+"+,& ,'
*'-& , ,! )-"+","'& ('"&, & , ,! !&&$ '&&,'* "+ W
-+ ,! "&,*&$ "*-", "%(& "+ W & ,! '&&,'* "%(1
& "+ W. !"+ -++ ,! )-"+","'& ('"&, ,' *"+ ,' %
! ,*&+","'& (*'( ,+ ,' ,! '(& "& ,! ." -&* ,+, & "+
*$, # ,' ,! )-"+","'& ('"&, -+"& ,! .'$, , ,! )-"+","'&
('"&, ,' *"+ ,' , ,! )-"+","'& ('"&, ,! ,"% "+($0 *'% ,! "*+,
+,( ,' ,! +'& +,( "+ ,! (*'( ,"'& ,"% *'% ,! )-"+","'& ('"&, ,'
,! '(& "& ,! ." -&* ,+, & # " -* Baseline Correction
+$"& '**,"'& "+ ,-* ' ,! *"+ & *"+ !"+
,-* !'$+ ,! "+($0 +$"& ' ,* "& '& $',"'& +(", .*"1
,"'&+ ' ,! '+, "& ,! +%($"& ! !+ '+, .*","'&+ * -+
0 !& + "& "%(& , ,! ." -&* ,+,
+$"& '**,"'& "+ +("$$0 -+-$ /",! %+-*%&,+ ",!1
'-, +$"& '**,"'& !& + "& ,! *+"+,& ,' *'-& '* ,!
$ '* ." -&* ,+, /'-$ -+ ,! &,"* +,( ,' %'. .*,"$$0 '&
,! "+($0
+$"& '**,"'& #(+ ,! +$"& "& '& $',"'& .*,"$$0 '* ,!
*"+ & *"+ 0'- & &$ +$"& '**,"'& *'%
,! *,"-$+ ('(1-( %&- '* %'* "&'*%,"'& '& +$"& '**,"'&
+ ,! '* 0'-* "&+,*-%&,
SDĆ24 User Manual
25
Taking TDR Measurements
Example:
Taking TDR
Measurements
$%- !2(+'! !(*)-.,.!- .$! "!./,! *" .$! 5 -(+'%)# $! -
%- (!.$* *" !2(%)%)# ) (!-/,%)# )!.1*,& *, .,)-(%--%*) '%)!
3 -!) %)# -.!+ %).* .$! )!.1*,& ) (*)%.*,%)# .$! ,!"'!.%*)-
*, .$%- !2(+'! 3*/ 1%'' )!! %)-.,/(!). (%)",(! 1%.$ . '!-. *)!
5 %)-.''! '-* 3*/ 1%'' )!! *)! '! +,!"!,'3 *" )'!)#.$
ăStep 1:ă)%.%'%4! .$! %)-.,/(!). +,!-- ) .*/$ Initialize
ăStep 2:ă*))!. 3*/, 1,%-. -.,+ .* .$! ).%-..% *))!.*, *) .$! ",*).
*" 3*/, %)-.,/(!).
ăStep 3:ă
..$ *)! !) *" .$! '! .* )3 5 -(+'%)# $! %)+/.
!0! .$! *.$!, !) /)..$! !! %#/,! 11801B
CSA 803A
Not Connected
Not Connected
Figure 11:ăConnections for Example
ăStep 4:ă,!-- .$! /..*) *) .$! -(+'%)# $!
%)+/. $))!' .* 1$%$ 3*/ $0! *))!.! .$! '!
ăStep 5:ă,!-- .$! /..*) ) .*/$ .$! Sampling Head
Fnc's -!'!.*,
ăStep 6:ă*/$ TDR Preset .* ./,) %. *) -!. Trigger .* Internal Clock
) /.*-!. .$! .,! */$ Exit .* ,!(*0! .$! +*+5/+ (!)/
$! -(+'%)# $! 1%'' ./,) *) ,! '%#$. )!2. .* .$! $))!' %)+/. *))!5
.*, %) %.%)# .$. %- .%0.! "*, .$. $))!' ) ! /-! *)
!$ $))!' %) !+!) !).'3
26
SDĆ24 User Manual
Taking TDR Measurements
ăStep 7:ă # $ " " ! $ "
# NOTE
Figure 12:ăTDR Step and Reflection
! SDĆ24 User Manual
27
Taking TDR Measurements
Changing Graticule Units for TDR
%$# #%" ) %# " %$# " r #%"
$ &"$ (# $ #%" $ "* $ (# % $ #%"$# ) %# $ Graticules #$ " $ &+
" " %
Figure 13:ăThe Graticules PopĆUp Menu
ăStep 8:ă % Graticules $ & " " % Feet "
Meters $ ! !+%! % ) % ' $$ $ !" !$ & $) ) %" "# " $ %$ $ % $ Propagation Velocity
#$ " %#$ $# !"$" ) % $ ' $ & $) " "
%# $" ( # !$ $ %$ # %$## %"
"!"#$# $ "$ $ #! $ $ ' ## !##
$" % ) %" $' " " $"### 28
SDĆ24 User Manual
Taking TDR Measurements
Example:
Differential and
Common Mode TDR
%" 7 *-)&+$ "! &/ )" 0, -".#,.* !&##"."+0&) +! ,**,+
*,!" *"/1."*"+0/ / !"/ .&"! ".)&". 0%" /*-)&+$ %"! %/ 03,
/*-)&+$ &+-10 %++")/ +! 03, &+!"-"+!"+0 /0"- $"+".0,./
%" /0"- $"+".0,. ,10-10 #,. " % %++") &/ /")" 0)" #,. -,/&0&2" ,.
+"$0&2" -,).&05 +! *-)&01!" %&/ "4*-)" 3&)) /%,3 5,1 %,3 0, 1/" 0%"
03, %++")/ +! /0"- $"+".0,./ ,# 0%" 7 0, -".#,.* !&##"."+0&) +!
,**,+ *,!" *"/1."*"+0/
,. 0%&/ "4*-)" 5,1 +""! + &+/0.1*"+0 3&0% 0 )"/0 ,+" 7 &+/0))"! &+
0%" )"#07*,/0 /),0 ,1 )/, +""! 03, )"/ -."#".)5 ,# +/ )"+$0%
ăStep 1:ă+&0&)&6" 0%" &+/0.1*"+0 -."// +! 0,1 % Initialize
ăStep 2:ă,++" 0 5,1. 3.&/0 /0.- 0, 0%" +0&/00&
,# 5,1. &+/0.1*"+0
,++" 0,. ,+ 0%" #.,+0
ăStep 3:ă00 % ,+" "+! ,# " % )" 0, 0%" 1--". +! ),3". %++")
,++" 0,./ ,+ 0%" /*" /*-)&+$ %"!
ăStep 4:ă."// 0%" 100,+ #,. 0%" 1--". %++") ,+
0%" /*-)&+$ %"!
ăStep 5:ă."// 0%" 100,+ +! 0,1 % 0%" Sampling Head
Fnc's /")" 0,.
ăStep 6:ă,1 % Diff TDR Preset 0, 01.+ ,0% / ,+ /"0 Trigger 0,
Internal Clock +! 10,/"0 0%" 1--". %++") %" !&/-)5 /%,1)! "
/&*&). 0, &$1." ăStep 7:ă,1 % 0%" Sampling Head Fnc's /")" 0,. $&+ %" ),3".
%++") ,+ " % /*-)&+$ %"! %/ + &+0".+) !")5 !'1/0*"+0 %&/
)"0/ 5,1 /"0 0%" 0&*" 0 3%& % 0%" /0"- $"+".0,. #,. 0%" ),3". %++")
//".0/ 0%" /0"- ,1 % 0%" TDR Head n Delay /")" 0,. %"+
0,1 % Exit 0, ."*,2" 0%" -,-71- *"+1
ăStep 8:ă1.+ "&0%". (+, ,+ 0%" *&+#.*" 0, !'1/0 0%" !")5 #,.
%++") %&/ 2.&"/ 0%" 0&*" 3%"+ %++") //".0/ 0%" /0"-
,0& " 0%0 0%" /" ,+! "!$" *,2"/ %,.&6,+0))5 .")0&2" 0, 0%" #&./0 "!$"
ăStep 9:ă."// 0%" 100,+ + 0%" !&/-)5 0,1 % Sampling
Head Fnc's ,1 % 2 +! 0%" TDR Polarity /")" 0,. %&/ 1/"/
%++") 0, //".0 -,/&0&2" /0"- ,1 % Exit
,0& " 0%0 0%" 1--". %++") &/ //".0&+$ -,/&0&2" /0"- %&/ &/ ,*7
*,+ *,!" %"+ 0%" /0"-/ ,+ 0%" 03, %++")/ ." 0%" /*" -,).&05 ,0% -,/&7
0&2" ,. +"$0&2" 5,1 + !"#&+" 0. " 0%0 ."-."/"+0/ 0%" 0.1" ,**,+
*,!" /&$+) 5 0,1 %&+$ 0%" DefTra & ,+ +! 0,1 %&+$ Mainframe 1 + Mainframe 2 Enter
SDĆ24 User Manual
29
Taking TDR Measurements
" ! ! # " $
# DefTra Mainframe 1 - Mainframe 2 Enter
TDT Measurements
" ! $
$ ! ! # " ! 30
SDĆ24 User Manual
Taking TDR Measurements
More About TDR
Measurements
! "! ! &
!! !! ! !$ ! # ! ! ! ! ! " "%
! ! ! ! ! # " ! ! " ! !
! ! ! ! ! # " ! ! " ! ! !
% ! !! ! ! % !$ !
! " ! ! ! % !$ ! !
$ " "! %" % $! ! # "% "
! ! ! # !" %" # % !
! ! ! ! ! $$ ! $$ ! ! $ !" ! ! $$ ! " ! #! ! $ ! ! ! ! ! ! ! # !
! ! ! ! %" !"! ! "!
$$ Propagation
Delay
(Incident)
Propagation
Delay
(Reflected)
Figure 14:ăTDR Propagation Delay
SDĆ24 User Manual
31
Taking TDR Measurements
32
SDĆ24 User Manual
Specifications
TableĂ1:ăAcquisition Electrical Specifications
Characteristics
Specifications
,"4'"1&
7 16.'!*
+.*',% #.#1'1'-, 1#
5'+2+
)7
','+2+
7
'0# '+#
.0 -/ *#00 1- #//1'-,0
,0 1- .0 #$-/# 01#.
" -/ *#00 16.'!*
t .0 $1#/ 01#.
-/ *#00 16.'!*
.0 1- ,0 $1#/ 01#.
-/ *#00 16.'!*
,0 1- ,0
"
-/ *#00 16.'!*
#*0#4&#/#
" -/ *#00 16.'!*
5'+2+ $# ,.21 '%,* -*1%#
5'+2+ '%,* -*1%#
" .9.
-1 /,0'#,1 #0.-,0#
!!2/!6 $1#/ !*' /1'-, 1
-.#/1',% 1#+.#/12/#
" $-/ 0'%,*0 2. 1- .9.
"(201+#,1 ,%#
"(201 *# 1- 2,'16 $-/ 0'%,*0 2. 1
.9.
'0.*6#" -'0#
,'16 -1 #0.-,0#
," -3#
8
+ +5 m
16.'!*
," #*-4
8
+ 16.'!*
'1& +--1&',%
," -3#
8 m +5 m 16.'!*
," #*-4
8 m 16.'!*
,.21 #/+',1'-, +.#",!#
SDĆ24 User Manual
" W
33
Specifications
TableĂ1:ăAcquisition Electrical Specifications (Cont.)
Characteristics
Specifications
0,)1&,+ "14""+ %++")0
v -8- 3,)1$" 1/+0*&00&,+ #/,*
%++") !/&3"+ 4&1% 1, .2&"0 "+1 %++")
&*" ,&+ &!"+ " "14""+
%++")0
2/ 6
-0
1&)&16
-0_ TableĂ2:ăStep Generator Electrical Specifications
Characteristics
Specifications
5&*2* "-"1&1&,+ 1"
(7
21-21 *-)&12!"
"
*
%++") ")6 !'201*"+1
" -0 16-& ) /")1&3" 1, %++") +0"/1&,+ ")6 1&)&16
+" %++")
" -0_ "14""+ %++")0
"
-0_ TableĂ3:ăTDR Electrical Specifications
Characteristics
Specifications
&0-)6"! &0" &*"
34
+ &!"+1
-0 16-& ) 1, 1
* ,/ * ,21-21
"#)" 1"!
-0 ,/ )"00 1, 1
* ,/ * ,21-21
5&*2* "-"1&1&,+ 1"
(7
+ &!"+1 "//1&,+0 1 * ,/
*
+0 1, -0 "#,/" 01"-
" ,/ )"00
-0 #1"/ 01"-
,/ )"00 16-& )
-0 1, +0 #1"/ 01"-
" ,/ )"00
+0 1, +0
" ,/ )"00
")0"4%"/"
" ,/ )"00
SDĆ24 User Manual
Specifications
TableĂ4:ăEnvironmental and Mechanical Specifications
Characteristics
Specifications
%*.,-7
,5&16 3;
*.,-7
11 .2
%.)7-
11 .2
*47-
11 .2
1'.*27 #*14*5&785*
4*5&7.2,
_ 73 _ _ 73 _ 32 34*5&7.2,
_ 73 _ _ 73 _ 07.78)*
4*5&7.2,
73 /1 +**7
32 34*5&7.2,
73 /1 +**7
81.).7:
73 5*0&7.9* -81.).7: &7 84 73
_ _
.0"4*(
**76 #
#:4* 0&66
0*(7531&,2*7.( 314&7.'.0.7:
$2.7*) "7&7*6
SDĆ24 User Manual
"# 7 859* " 7 "
7 " 7 !
7 !" 7 !"
7 !" 7 0.1.7*) 73 ;
35
Specifications
36
SDĆ24 User Manual
Glossary
Autoset
! $ ! Baseline Correction
$ ! ! " $ ! "
Channel
" #
Channel Number
& "$ $ &
Common Mode
" "
Default Measurement Parameter
! ! ! &
Differential Mode
" ! Incident Step
Initialize
$ " Internal Clock
$% " Reflected Step
&
Rho (r)
! SDĆ24 User Manual
37
Glossary
Setting
Smoothing
Time Domain Reflectometry (TDR)
!
Time Domain Transmission (TDT)
!
Trigger
Waveform
38
SDĆ24 User Manual
Index
A
F
S
#'%&!
$'&$* $% & &!$* '&% " "$&$% !!" !%& ' "&' &$ ! % B
% !$$&! I
"'& (!& )' '&&! !!& &" $&!$
$'&$* ! &$! !"$&! &!$ "$&$ ('% C
!! ! %'$ &%
!
$! & " '&&! % ! &!$% &% &!$% ! %& &%
&!$* '&% %$ ! %& &% L
!!" '%& %$ O
D
* %&" $&!$ $ & %'$ &% %& '
'%& %$ ! &$! * $ & !! !
%'$ &% "'% & "!$&* & %'$ &% "'% "&'
'%& %$ R
E
$ " &$!+%&& %$
"$'&! % ! ' &% %& '$* ' T
!& ! % U
%$ ! %& &% % & #'%&! V
$ * SDĆ24 User Manual
39
40