Download Service Manual SD-24 TDR/Sampling Head 070–7053–01

Service Manual
SD-24
TDR/Sampling Head
070–7053–01
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.
Please check for change information at the rear
of this manual.
First Printing: May 1993
#%* +/4536.'/5 .#/6(#%563'& $: ',530/+9 *#4 # 4'3+#- /6.$'3 0/ # 1#/'- +/4'35 03 5#) 03 45#.1'& 0/ 5*'
%*#44+4 *' (+345 -'55'3 +/ 5*' 4'3+#- /6.$'3 &'4+)/#5'4 5*' %06/53: 0( .#/6(#%563' *' -#45 (+7' &+)+54 0( 5*'
4'3+#- /6.$'3 #3' #44+)/'& 4'26'/5+#--: #/& #3' 6/+26' 50 '#%* +/4536.'/5 *04' .#/6(#%563'& +/ 5*'
/+5'& 5#5'4 *#7' 4+9 6/+26' &+)+54 *' %06/53: 0( .#/6(#%563' +4 +&'/5+(+'& #4 (0--084
',530/+9 /% '#7'350/ 3')0/ ',530/+9 /+5'& +/)&0. 5& 0/&0/
0/:',530/+9 #1#/
',530/+9 0--#/& ! ''3'/7''/ *' '5*'3-#/&4
/4536.'/54 .#/6(#%563'& (03 ',530/+9 $: '95'3/#- 7'/&034 0654+&' 5*' /+5'& 5#5'4 #3' #44+)/'& # 580 &+)+5
#-1*# %0&' 50 +&'/5+(: 5*' %06/53: 0( .#/6(#%563' ') (03 #1#/ (03 0/) 0/) (03 43#'- '5%
',530/+9 /% 09 '#7'350/ 3+/5'& +/ 01:3+)*5 E ',530/+9 /% -- 3+)*54 3'4'37'& ',530/+9 130&6%54 #3' %07'3'& $: #/&
(03'+)/ 1#5'/54 +446'& #/& 1'/&+/) *' (0--08+/) #3' 3')+45'3'& 53#&'.#3,4 " #/& ;
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
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1Ć1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing and Removing the Sampling Head . . . . . . . . . . . . . . .
Packaging for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1Ć1
1Ć2
1Ć4
1Ć6
1Ć7
!
Checks and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Ć1
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using These Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 1 PowerĆOn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 2 Dot Transient Response . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 3 Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 4 Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 5 Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 6 Acquisition Aberrations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 7 Coincidence Between Channels . . . . . . . . . . . . . . . . . . . .
Part 8 Maximum Signal Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 9 Isolation Between Channels . . . . . . . . . . . . . . . . . . . . . . . .
Part 10 Output Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 11 TDR Aberrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Part 12 Reflected Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Ć3
2Ć5
!
!
!
!
2Ć8
2Ć10
2Ć15
2Ć19
2Ć22
2Ć25
2Ć29
2Ć32
2Ć35
2Ć38
2Ć40
2Ć44
General Information
Checks and Adjustments
SDĆ24 Service Manual
i
Table of Contents
Maintenance
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3Ć1
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*'%#% %# '% & '',"&') ) &&'#" *"" !$ " & !#)" " $ " ' !$ " "'%"
%('%+ "" ' !$ " "''#" (!% 3Ć1
,
,
,
,
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Ć1
System Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDR Step Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
$%'#" ' #%' %(' $%'#" ' W # $%'#" ' " $" %(' TDR Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loop Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Offset Null . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4Ć2
4Ć3
,
,
,
4Ć5
4Ć6
4Ć7
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5Ć1
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . .
5Ć1
5Ć2
,
,
Theory of Operation
Replaceable Parts
ii
Contents
List of Figures
'%1.# 65 *-)'+% # " ,*- .0*#+0/ '+ + +"
'%1.# 65+/0 ))'+% *-)'+% # " + + +/0.1*#+0 '%1.# 65,! 0',+/ ,$ ,+0.,)/ +" ,++#!0,./ ,+ '+$. *#
+/0.1*#+0/ '%1.# 65 *-)'+% # " !.#2 ,! 0',+/ '%1.# 65 '*# /#,+0.,))#. , ." 1*-#. ,! 0',+ '%1.# 656 *-)'+% # " ),!( ' %. * '%1.# 650#- #+#. 0,. '*-)'$'#" !&#* 0'! ' %. * '%1.# 650#- #+#. 0,. '0& &,.0#" 10-10 '%1.# 650#- #+#. 0',+ '0& W , " '%1.# 650#- #+#. 0',+ '0& + -#+ '.!1'0 '%1.# 6
5'/-) 4#" . !# '0& &.## ,,- '+ #00'+%/ '%1.# 653-),"#" '#2 ,$ 0&# 6 *-)'+% # " SDĆ24 Service Manual
6
6
6
6
6
6
6
6
6
6
6
6
iii
iv
List of Tables
)+*$&#% %$ !% $ )+*$% "&!% )+*"&$% ##% !% $ )+* ##% !% $ )+*%' &$!%%( % %# $%% $# SDĆ24 Service Manual
+
+
+
+
+
v
vi
General Information
!* *+!&% !-* ## + !%&)$+!&% % +& ''#/ '&.) +& + 1
$'#!% +/ !%&)$+!&% * .## * !%&)$+!&% &% !%*+##!% % )$&-!% + *$'#!% '"!% &) * !'$%+ % %-!)&%$%+# &%!+!&%* *,
* &')+!% +$')+,) !* !%#, )
Introduction
!* *!% &) ,* /
(,#!! *)-! ')*&%%# + &%+!%* !%&)$+!&% %**)/ +& " %
$!%+!% + 1 $'#!% 1 $'#!% !* +.&1 %%# '* )!*+!$ *$'#!%
%%# !* #*& '# & %)+!% !+* &.% &,+',+ ',#*
1 $'#!% !* *!% &) ,* !% )!* !!+#
$'#!% *!##&*&'* + 1 ,#+!1 %%# %!+ % + )!* &$$,%!+!&%* !%# %#/0)*
SDĆ24 Service Manual
1Ć1
General Information
Safety Summary
" " ! ! $
! " " " "
Terms in Manuals
CAUTION " "
WARNING " " Terms on Equipment
CAUTION " # "
# " DANGER " # " $
Symbols in Manuals
Static Sensitive Devices
Symbols on Equipment
DANGER
High Voltage
Protective
ground (earth)
terminal
ATTENTION
Refer to
manual
Grounding the Instrument
! ! " ! $ " !" $
! Danger Arising from Loss of Ground
$ " 1Ć2
General Information
General Information
Do Not Operate in Explosive Atmospheres
SDĆ24 Service Manual
1Ć3
General Information
Installing and
Removing the
Sampling Head
$ ! ! ! ! !! ! !"! "$ # ! ! ! !"! !
! ! !! Sampling Head
Compartments
11801B
Sampling Head
Compartments
CSA 803A
Power Only Sampling
Head Compartments
Figure 1Ć1:ăSampling Head Compartments in an 11801B and a
CSA 803A
1Ć4
General Information
General Information
# # "&# "# # # " !## "&' $" # &# ! !""$! # " " "# #$! # (& "!& # ## # " $! (
CAUTION
To avoid damage to the instrument, set the instrument's ON/
STANDBY switch to STANDBY before installing or removing a
sampling head.
If the green indicator light remains on when the STANDBY position
is selected, then the switch has been left internally disabled after
the servicing of the power supply. To enable the ON/STANDBY
switch, refer to the Maintenance section of your instrument's SerĆ
vice Manual.
!% # " ! "#!$# "# # "#!$#"
"&# # $! # (& "!& # " #
" # "&' $ $# # " !
LockĆDown
Screw
Sampling
Head
Figure 1Ć2:ăInstalling a Sampling Head In An Instrument
SDĆ24 Service Manual
1Ć5
General Information
Packaging for
Shipment
$#'' '* " &)' ( #&" &(#" " $" (# $
'!$ " +" '$$" ( - #!!& (&"'$#&((#"
(( ( (# ( '!$ " ( ' '$$ (# -#)& # (&#",
&* "(& #& '&* #& &$& " ) ( # #+" "#&!(#" #" (
(
H
! " &'' # ( "'(&)!"( " '!$ " #+"&
H
! # $&'#" ( -#)& &! +# " #"(( #)( ( "'(&).
!"( " '!$ " H
#!$ ( "'(&)!"( " '!$ " (-$ " '& ")!&
H
'&$(#" # ( '&* &%)&
( '!$ " ' # #+' ( #&" $ ' "#( * .
#& ' "#( ( #& )'
ăStep 1:ă(( '#&( &)( (&!"(#"' (# ( '!$ " "$)('
ăStep 2:ă(" #&&)( &#& &(#" +( "' !"'#"' (
'( ', "' ! &(& (" ( '!$ " !"'#"'
' &(#" +( )&'(" ('( '(&"( # ( '( $#)"' $&
'%)&."
ăStep 3:ă) - +&$ ( '!$ " +( "(.'(( '(" #& ('
%)* "( (# $&#(( ( "'
ăStep 4:ă( - $ )"" #& )&(" #! (+" ( &(#" "
( '!$ " (# )'#" ( '!$ " #" '' #+
(& "' # $" #" '
ăStep 5:ă ( &(#" +( '$$" ($ #& +( ")'(& '($ '
ăStep 6:ă& ( &'' # ( (&#", &* "(& " -#)&
&()&" &'' #" ( &(#" " #" #& !#& $&#!""( $ '
1Ć6
General Information
General Information
Operating
Environment
% $ " # "! $ " !# " ! Operating Temperature
" " ! % " " " "# ! "% _ _ " " ! " " "# ! _ " _ " !" " " "# ! #"! " " "! %
" !!! " " " " "# &
% % #" % # " "! "
# & # " !" #" "! !#
" " " "# ! " "' " !
! $ " !" #"
SDĆ24 Service Manual
1Ć7
1Ć8
Checks and Adjustments
!+ +,!'& '&,!&+ (*'-*+ ,' # , +(!!,!'&+ & %+-*2
%&, $!%!,+ $!+, !& $ 2 (!!,!'& '* +-*%&, !%!, !+
$!+, , , !&&!& ' (*, + /$$ + (*'-*+ '&,!& '&$0
# +,(+ +!& , 2 %($!& + &' !&,*&$
"-+,%&,+
(*'-*+ !& , !+ +,!'& (*'.! $'!$ +)-& ' #+ '*
(*'*%!& '%(* &+!. (*'*%& .*!!,!'& (*'-* ,' .*!0
, , , +%($!& %,+ +(!!,!'&+ ' -&,!'&$$0 ,+, , +%2
($!& (*'*% , (*,+ !& $2 / ! . 10+ !&!,!'& !&
, -&,!'&$ +, '$-%&
* ,' , 2 '* %'* !&'*%,!'&
'-, +(!!,!'&+ & +%($!& '(*,!'& * ,' $ 2 '*
!&'*%,!'& '&*&!& ,+, )-!(%&, -+ !& , +,-(+
TableĂ2Ć1:ăMeasurement Limits and Specifications
Part and Description
Measurement
Limit
Specification
Functional
Test
*, '/*2&
&'&
&'&
0+
*, ', *&+!&,
+('&+
% /!, -,'%,!
$!*,!'&
v **'*
0+
% /!, -,'%,!
$!*,!'&
v **'*
&'
% /!, -$,
+,,!&+
" **'*
&'
/!, '-, -,'%,!
$!*,!'&
"-+, ,' &'
, *, +,
+,
+, & /!,
*(,!,!'& *,
SDĆ24 Service Manual
" %
0+
" %
&'
2Ć1
Checks and Adjustments
TableĂ2Ć1:ăMeasurement Limits and Specifications (Cont.)
Part and Description
Measurement
Limit
Specification
.0 +'/# *" +2#
)++0&'*% +*
)++0&'*% +$$
*+
v m
v
)
.0 +'/# *" #(+3
)++0&'*% +*
)++0&'*% +$$
*+
v m
v
)
.0 '/# ')#
,/
.0 !-1'/'0'+*
#..0'+*/ 3'0&
/+1.!#
0+ ,/
,/ 0+ */
*/ 0+ */
*/ *" 1,
*/ 0+ ,/
0+ "
"
"
"
,/
*+
+$ /0#,
),('01"#
*+
.0 /+(0'+* #03##*
&**#(/
*+
.0 10,10 ),('01"#
) " )
5#/
.0 #..0'+*/
0+ ,/
,/ 0+ */
*/ *" 1,
*/ 0+ ,/
.0 #$(#!0#" '/#
')#
2Ć2
5#/
*+
.0 +'*!'"#*!# #6
03##* &**#(/
.0 4')1) '%*(
+(0%#
Functional
Test
*+
0+ "
"
"
,/
*+
Checks and Adjustments
Checks and Adjustments
Test Equipment
Table 2Ć2 lists test equipment suggested for use with this manual. Procedure
steps are based on the test equipment examples given, but other equipment
with similar specifications may be substituted. Test results, setup informaĆ
tion, and related connectors and adapters may be altered by the use of
different equipment.
TableĂ2Ć2:ăTest Equipment
SDĆ24 Service Manual
Description
Minimum
Specification
Examples of Applicable
Test Equipment
11800 Series or
CSA 803 Series
instrument
Tektronix digital
sampling oscilloscope
or communications
signal analyzer
Tektronix 11800 Series Digital
Sampling Oscilloscope or
Tektronix CSA 803 Series
Communications Signal
Analyzer
Pulse Generator
1 ns rise time, 5 V outĆ
put, 10 Hz to 250 MHz
frequency range
Tektronix PG 502 Pulse
Generator with a TM 500
Series Power Module
Time Mark
Generator
1 ns through 5 s
markers in a 1-2-5
sequence, at least 5
parts in 10& accuracy
Tektronix TG 501A Time Mark
Generator with a TM 500
Series Power Module
Calibration
Generator
DC output, 0.5%
accuracy 1 V output
amplitude
Tektronix PG 506A Calibration
Generator with a TM 500
Series Power Module
Calibration Step
Generator
Tektronix 067-1338-0X
Calibration Step Generator
(where X represents either a
0, 1, 2, 3, 5, or 6; depending
on the power supply
appropriate for your country.
Refer to Section 5, )
System Controller Any compatible
controller with MS DOS
and a serial port
configured for COM1
IBM compatible PC with
terminal emulation software
50 W Termination,
SMA connectors
Impedance 50 W, SMA
male connector
Tektronix Part 015-1022-00
50 W Termination,
BNC connectors
Impedance 50 W, BNC
connectors
Tektronix Part 011-0049-01
Precision Short
Circuit
Termination
Female 3.5 mm
compatible connectors
Tektronix Part 011-0150-00
Precision 6Ćinch
SemiĆRigid Cable
Male to male 3.5 mm
compatible connectors
Tektronix Part 015-0564-00
2Ć3
Checks and Adjustments
TableĂ2Ć2:ăTest Equipment (Cont.)
Description
Minimum
Specification
Examples of Applicable
Test Equipment
&)+ !),!+
)$!%+&)* &%%+!&%*
)(,!)
# &%%+&)*
"+)&%!/ )+ &/!# #
W )(,!)
W 1!% $#
&%%+&)*
"+)&%!/ )+ )!# #
1+ 11 #
"+)&%!/ )+ '+) +&
)(,!)
$# +& $#
"+)&%!/ )+ ++%,+&) ++%,+!&% W
&% $# % &%
$# "+)&%!/ )+ ++%,+&) ++%,+!&% W
&% $# % &%
$# "+)&%!/ )+ )!*+ +)'
"+)&%!/ )+ ++! &%+)&# +
"+)&%!/ )+ #1&*
#!)*
&0!)!-
).)!-)
2Ć4
+!'
Checks and Adjustments
Checks and Adjustments
Using These
Procedures
')+ %* . + *+,' ##,*+)+ &% ++ *&.* .+ +*+ (, '$%+ *
% % &. +& &%%+ + ) +& # 2 &) % /$'# & + +*+
(, '$%+ &) ')+
Conventions in this Manual
% +* ')&,)* + &##&. % &%-%+ &%* ) ,*
H
#++)* . + % + &0 & +/+ %+ 0 )&%+ '%# &%+)&#*
% +&)* % &%%+&)* &) /$'# &% + %*+),$%+
% *$'# % H
Bold #++)* %+ 0 $%, ##* % *'#0 $***
H
% + # ' +# #++)* %+ 0 &%%+&)* &%+)&#* % % +&)* &)
/$'# &* + &% &% **& + +*+ (, '$%+ % + # ' +# #++)*
#*& %+ 0 !,*+$%+* %* + *$'# % % *&$ *+'* + )*+ .&) * +# 1 +& %+ 0 *+' ++ &%+ %* ')&)$% -) + &% %&) % !,*+$%+ %*+),+ &% &) /$'# Check * + )*+ .&) % + + +# & *+' % #+) # *' + &% *
" Adjust '')* % + + +# + *+' %-&#-* % #+) # !,*+2
$%+ Examine * + )*+ .&) % + + +# + *+' &%)%* $*,)$%+
# $ +* ++ % + .+) + *$'# % * &')+ % ')&')#0 +*
# $ +* ) %&+ +& %+)')+ * #+) # *' + &%*
Initialized and Stored Settings
+ + %% % & $&*+ *+'* + ,*) * %*+),+ +& Initialize + %*+),2
$%+ * ')+ & + *+,' Initialize +,) - ## +)&, +
$%, ')*+* ## %*+),$%+ &%+)&#* % ,%+ &%* +& "%&.% -#2
,* % + # 1 % + %*+),$%+ + + %% % & *+' # $ %+* +
'&** # +0 & *++ %* )&$ ')- &,* ')+* ,* % ))&%&,* &) &%,* %
)*,#+*
Menu Selections and Measurement Techniques
+ #* &% $*,)$%+ +% (,* % %*+),+ &%* &) $" % $%,
*#+ &%* ) %)##0 %&+ %#, % + * $%,# &$')%* - 2
*) '+ &%* & $%,* % %*+),$%+ +,)* ) #&+ % + User Manual
&) 0&,) %*+),$%+ % + SDĆ24 TDR/Sampling Head User Manual
SDĆ24 Service Manual
2Ć5
Checks and Adjustments
Setup Illustrations
& &$ * #$ % ! $ $ ! # #$ &% $ *+# $ % # $%#&% %$ !# &#$ ,# $%#&% $ $ ( !# &#
% )% % % #$ * &# # $%#&% * #
# %% $ ( % &$%#% !#%&# % $ $ ! #$ &% $
*+#$ ' * %( $! "&$% !#%%$ $
!# % &# % #$ $ $ !$ % $ %# $
% #$ $%#&% # $ ( &#Ă-
2Ć6
Checks and Adjustments
Checks and Adjustments
11801
Left Sampling Head
Compartment
Calibrator Output
Trigger Input
Internal Clock Output
11802
Left Sampling Head
Compartment
Calibrator Output
Trigger Input
Internal Clock Output
11801A and 11801B
Left Sampling Head
Compartment
Calibrator Output
Antistatic Connection
Trigger Input
Internal Clock Output
CSA 803 and CSA 803A
Left Sampling Head
Compartment
Calibrator Output
Antistatic Connection
Trigger Inputs
Internal Clock Output
Figure 2Ć1:ăLocations of Controls and Connectors on Mainframe Instruments
SDĆ24 Service Manual
2Ć7
Checks and Adjustments
Part 1
PowerĆOn
"-#*-( /%&. +-/ 1&/%&) /%" (&")/ /"(+"-/0-" -)$" *# _ )!
_Ă /* ..0-" +-*+"- &)./-0(")/ *+"-/&*)
Setup to PowerĆOn
11801B
Sampling
Head
CSA 803A
Sampling
Head
Procedure to Power On
ăStep 1:ă"/ /%" #*''*1&)$ &) /%" *-!"- '&./"!
(+'&)$ "! */ &)./''"! 2"/
)./-0(")/ &)#-("
.1&/ % ăStep 2:ă)./'' /%" 3 .(+'&)$ %"! &) /%" &)./-0(")/. '"#/3(*./
*(+-/(")/
ăStep 3:ă&/% /%" &)./-0(")/. -"- +)"' ."/ /* *))" / /%" &)./-0(")/ /* .0&/'" +*1"- .*0- "
ăStep 4:ă"/ /%" -"- +)"' /* )! /%")
/%" &)./-0(")/. #-*)/ +)"' .1&/ % /* %") /%" &)./-0(")/ &. #&-./ &)./''"! /%" -"- +)"' .%*0'! " ."/ /* )! -"(&) &) /%" +*.&/&*) %") 0." /%"
#-*)/ +)"' .1&/ % /* +"-#*-( '' .0.",0")/ +*1".1&/ %&)$
2Ć8
Checks and Adjustments
Checks and Adjustments
ăStep 5:ă
!" ! ! ! H
H
H
H
"
H
SDĆ24 Service Manual
! !" 2Ć9
Checks and Adjustments
Part 2
Dot Transient
Response
" ! ! $
# Ă " ! " ! " ! Measurement Limits
! H
v " ! " ! H
v " ! " ! Specifications
! ! Setup to Check Dot Transient Response
11801B
Pulse
Generator
! !
CSA 803A
Pulse
Generator
! !
2Ć10
Checks and Adjustments
Checks and Adjustments
Procedure to Check Dot Transient Response
ăStep 1:ă1-7-%/-=) 7,) -167580)17 6)77-1+6 7,)1 0%.) 7,) *2//2:-1+ 6)7>
7-1+6 -1 7,) 25()5 /-67)(
%03/-1+ )%(
1** 1
167580)17 %-1*5%0)
Vert Size: M1 0"(-9-6-21
&87721 35)66
Source Internal Clock
Main Pos Min
Main Size 16(-9-6-21
8/6) )1)5%725
%'. )50-1%725 &87721 38// 287
5-++)5 285') ;7)51%/ 5-++)5
87387 648%5) :%9)
Examine Dot Response at 250 mV with Automatic Calibration
Settings ? &< 3)5*250-1+ 7)36 7,528+, ăStep 2:ă)7 7,) 38/6) +)1)5%7256 %03/-78() *25 % 0" (-63/%<
ăStep 3:ă)7 7,) Vert Offset: M1 62 7,%7 7,) 67)3 -6 %3352;-0%7)/< ')1>
7)5)( 21 7,) 6'5))1
ăStep 4:ă5)66 7,) ! $ &87721 %1( 728', Enhanced Accuracy
%1( )5-)6 25 35)66 7,) !$
&87721 ăStep 5:ă 28', Loop Gain
ăStep 6:ă 28', Automatic Calibrate %1( 7,)1 Proceed -1 7,) Loop
Gain Calibration 323>83 0)18
ăStep 7:ă 28', Exit -1 7,) Loop Gain Calibration 323>83 0)18
ăStep 8:ă)7 7,) 38/6) +)1)5%7256 %03/-78() *25 % 0" 67)3 (-63/%<
ăStep 9:ă5)66 7,) #" &87721 %1( 7,)1 728', Horizontal Desc
ăStep 10:ă 28', Main Record Length -1 7,) Horizontal Description
323>83 0)18 %1( 7,)1 6)7 7,) 723 .12& *25 % Main Record Length
2*
ăStep 11:ă5)66 7,) ! $ &87721 %1( 7,)1 Instr Options
ăStep 12:ă)7 Vectored Trace 72 Off -1 7,) Instrument Options 323>83
0)18
ăStep 13:ă 28', Display Intensity -1 7,) Instrument Options 323>83
0)18 %1( 7,)1 6)7 7,) 723 .12& *25 90% -17)16-7<
ăStep 14:ă 28', Exit
SDĆ24 Service Manual
2Ć11
Checks and Adjustments
ăStep 15:ă-2"' Cursors -, 1'$ 1-. -% 1'$ 0"/$$,
ăStep 16:ă-2"' Cursor Type ,# 1'$, Horizontal Bars (, 1'$ Cursor
Type .-.52. +$,2
ăStep 17:ă-2"' Exit
ăStep 18:ă$1 Cursor 1 1-. ),-! 1- 1'$ 3$/ &$ -% 1'$ !-11-+ -% 1'$
.2*0$ !$%-/$ 1'$ 01$.
ăStep 19:ă$1 Cursor 2 !-11-+ ),-! 1- 1'$ 1-. -% 1'$ 01$.
ăStep 20:ă$ # DV 0 1'$ .$ )51-5.$ ) 01$. +.*(12#$ ,# 1'$, /$"-/#
1'(0 3 *2$ 0 V %-/ * 1$/ 20$
ăStep 21:ă/$00 1'$ !211-, ,# 1-2"' Enhanced Accuracy
,# $/($0 -/ ./$00 1'$ !211-, ăStep 22:ă-2"' Loop Gain ,# 1'$, 1'$ "' ,,$* 4-2 /$ 20(,& (, 1'$
Loop Gain Calibration .-.52. +$,2
ăStep 23:ă$1 1'$ Divide by Two Mode 1- On (, 1'$ Loop Gain
Calibration .-.52. +$,2
ăStep 24:ă-2"' Exit (, 1'$ Loop Gain Calibration .-.52. +$,2
ăStep 25:ă-2"' Cursors 1 1'$ 1-. -% 1'$ 0"/$$,
ăStep 26:ă$1 Cursor 1 1- 1'$ 3$/ &$ -% 1'$ !-11-+ -% 1'$ .2*0$ !$%-/$
1'$ 01$.
ăStep 27:ă$1 Cursor 2 1- 1'$ 3$/ &$ -% 1'$ !-11-+ -% 1'$ .2*0$ 2,#$/
1'$ 01$.
ăStep 28:ă$ # DV ,# 1'$, /$"-/# 1'(0 3 *2$ 0 VL %-/ * 1$/ 20$
ăStep 29:ă$1 Cursor 2 1- 1'$ 3$/ &$ -% 1'$ 1-. -% 1'$ .2*0$
ăStep 30:ă $ # D ,# 1'$, /$"-/# 1'(0 3 *2$ 0 VH %-/ * 1$/ 20$.
ăStep 31:ă 1' 1 1'$ ,$& 1(3$ #-1 /$0.-,0$ $//-/
VL/VH
(0 v
ăStep 32:ă 1' 1 1'$ .-0(1(3$ #-1 /$0.-,0$ $//-/
VHV)VVL (0 v
Examine Dot Response at 500 mV with Automatic Calibration
Settings 6 !4 .$/%-/+(,& 1$.0 1'/-2&' ăStep 33:ă/$00 1'$ !211-, ,# 1-2"' Enhanced Accuracy
,# $/($0 -/ ./$00 1'$ !211-, ăStep 34:ă-2"' Loop Gain ,# 1'$, 0$1 Divide by Two Mode 1- Off (,
1'$ Loop Gain Calibration .-.52. +$,2
2Ć12
Checks and Adjustments
Checks and Adjustments
ăStep 35:ă05%* Exit
ăStep 36:ă'4 4*' Vert Size:M1 40 .&+6
ăStep 37:ă'4 4*' 15-3' )'/'2#4023 #.1-+45&' (02 # . 34'1 &+31-#7
ăStep 38:ă05%* Cursors 0/ 4*' 401 0( 4*' 3%2''/
ăStep 39:ă'4 Cursor 1 40 4*' #6'2#)' 0( 4*' $0440. 0( 4*' 15-3' $'(02'
4*' 34'1
ăStep 40:ă'4 Cursor 2 40 4*' #6'2#)' 0( 4*' 401 0( 4*' 15-3'
ăStep 41:ă'#& DV #3 4*' 1'#,84081'#, 34'1 #.1-+45&' #/& 4*'/ 2'%02&
4*+3 6#-5' #3 V (02 -#4'2 53'
ăStep 42:ă2'33 4*' $5440/ #/& 405%* Enhanced Accuracy
#/& '2+'3 02 12'33 4*' $5440/ ăStep 43:ă05%* Loop Gain #/& 4*'/ 4*' %*#//'- /5.$'2 705 #2' 53+/)
+/ 4*' Loop Gain Calibration 101851 .'/5
ăStep 44:ă'4 Divide by Two Mode 40 On +/ 4*' Loop Gain Calibration
101851 .'/5
ăStep 45:ă05%* Cursors #4 4*' 401 0( 4*' 3%2''/
ăStep 46:ă'4 Cursor 1 40 4*' #6'2#)' 0( 4*' $0440. 0( 4*' 15-3' $'(02'
4*' 34'1
ăStep 47:ă'4 Cursor 2 40 4*' #6'2#)' 0( 4*' $0440. 0( 4*' 15-3' #(4'2
4*' 34'1
ăStep 48:ă'#& 4*' DV 6#-5' #/& 4*'/ 2'%02& 4*+3 6#-5' #3 VL (02 -#4'2
53'
ăStep 49:ă'4 Cursor 2 40 4*' #6'2#)' 0( 4*' 401 0( 4*' 15-3'
ăStep 50:ă'#& DV #/& 4*'/ 2'%02& 4*+3 6#-5' #3 VH (02 -#4'2 53'
ăStep 51:ă 4*#4 4*' /')#4+6' &04 2'310/3' '2202
!VL/VH
" +3 v
ăStep 52:ă 4*#4 4*' 103+4+6' &04 2'310/3' '2202
!
VHV)VVL" +3 v
Examine Dot Response at 500 mV with default settings 9 $7 1'28
(02.+/) 4'13 4*205)* ăStep 53:ă2'33 4*' $5440/ #/& 405%* Enhanced Accuracy
#/& '2+'3 02 12'33 4*' $5440/ ăStep 54:ă05%* Loop Gain #/& 4*'/ Recall Defaults +/ 4*' Loop Gain
Calibration 101851 .'/5
SDĆ24 Service Manual
2Ć13
Checks and Adjustments
ăStep 55:ă05&+ Exit
ăStep 56:ă05&+ Cursors $4 4+( 401 0) 4+( 3&2((/
ăStep 57:ă(4 Cursor 1 40 4+( $6(2$*( 0) 4+( %0440. 0) 4+( 15-3( %()02(
4+( 34(1
ăStep 58:ă(4 Cursor 2 40 4+( $6(2$*( 0) 4+( %0440. 0) 4+( 15-3( $)4(2
4+( 34(1
ăStep 59:ă($' 4+( DV 6$-5( $/' 4+(/ 2(&02' 4+,3 6$-5( $3 VL )02 -$4(2
53(
ăStep 60:ă(4 Cursor 2 40 4+( $6(2$*( 0) 4+( 401 0) 4+( 15-3( $/' 2($'
DV (&02' 4+,3 6$-5( $3 VH
ăStep 61:ă
4+$4 4+( .$*/,45'( 0) 4+( /(*$4,6( '04 2(310/3( (2202
"VL/VH # ,3 v
Check Dot Response at 1V with Manual Calibration Settings ; %9
1(2)02.,/* 4(13 4+205*+ ăStep 62:ă2(33 4+( ! %5440/ $/' 405&+ Enhanced Accuracy
$/' (2,(3 02 12(33 4+( !
%5440/ ăStep 63:ă05&+ Loop Gain $/' 4+(/ 3(4 4+( Divide by Two Mode 40
Off ,/ 4+( Loop Gain Calibration 101:51 .(/5
ăStep 64:ă05&+ Exit
ăStep 65:ă(.06( 4+( $44(/5$402 $/' 4+(/ &0//(&4 4+( $44(/5$402 40 4+( &+$//(- 905 $2( 53,/* $/' 4+( &0$8,$- &$%-(
ăStep 66:ă(4 4+( Vert Size:M1 40 . ',6
ăStep 67:ă(4 4+( 15-3( *(/(2$4023 $.1-,45'( )02 $ ',31-$9
" 34(1
ăStep 68:ă2(33 4+( ! %5440/ $/' 405&+ Enhanced Accuracy
$/' (2,(3 02 12(33 4+( !
%5440/ ăStep 69:ă05&+ Loop Gain $/' 4+(/ 4+( &+$//(- /5.%(2 905 $2( 53,/*
,/ 4+( Loop Gain Calibration 101:51 .(/5
ăStep 70:ă(4 4+( Divide by Two Mode 40 On $/' 4+(/ 405&+ Manual
Calibrate ,/ 4+( Loop Gain Calibration 101:51 .(/5
ăStep 71:ă05&+ Exit
ăStep 72:ă 4+$4 4+( $.1-,45'( 0) 4+( 15-3( .($352(' )20. 4+(
$6(2$*( 0) 4+( -(6(- 5/'(2 4+( 15-3( 40 4+( $6(2$*( 0) 4+( 401 0) 4+(
15-3( &$/ %( 3(4 7,4+ 4+( .$/5$- &$-,%2$4,0/ 3(44,/*3 40 %( w ăStep 73:ă(1($4 4(13 4+205*+ )02 &+$//(- 2Ć14
Checks and Adjustments
Checks and Adjustments
Part 3
Offset
Measurement Limits
" Specifications
" Setup to Examine Offset
W 11801B
W CSA 803A
SDĆ24 Service Manual
2Ć15
Checks and Adjustments
Procedure to Examine Offset
ăStep 1:ă/*4*"-*8& 4)& */3425.&/4 3&44*/(3 4)&/ .",& 4)& '0--07*/( 3&49
4*/(3 */ 4)& 02%&2 -*34&%
".1-*/( &"%
/'' /
/3425.&/4 "*/'2".&
#5440/ 12&33
Source Internal Clock
! #5440/ 12&33
! #5440/ &2*&3 12&33
Enhanced Accuracy &2*&3 405$)
Calibrate All 101951 .&/5 Recall Defaults
ăStep 2:ă05$) Offset Null */ 4)& Enhanced Accuracy .&/5
ăStep 3:ă05$) Manual Calibrate */ 4)& Offset Nulling 101951 .&/5
ăStep 4:ă05$) 4)& Offset Null: M1 3&-&$4 0 "/% 4)&/ 405$) Enter */
4)& Numeric Entry & Knob Res 101951 .&/5
ăStep 5:ă05$) 4)& 6&24*$"- *$0/ "/% 4)&/ 3&4 Vert Size: M1 40
āā. %*6
ăStep 6:ă2&33 4)& #5440/
ăStep 7:ă05$) Measurements "/% 4)&/ Mean */ 4)& Measurements
101951 .&/5
ăStep 8:ă05$) Mean */ 4)& ."+02 .&/5 "/% 4)&/ 3&4 Data
Interval 40 whole zone */ 4)& Mean 101951 .&/5
ăStep 9:ă 4)"4 Mean *3 " . ăStep 10:ă2&33 4)& ! #5440/ "/% 405$) Enhanced Accuracy
"/% &2*&3 02 12&33 4)& !
#5440/ ăStep 11:ă05$) Offset Null
ăStep 12:ă05$) Automatic Calibrate "/% 4)&/ Proceed */ 4)& Offset
Nulling 101951 .&/5
ăStep 13:ă2&33 4)& #5440/
ăStep 14:ă 4)"4 4)& Mean 0''3&4 *3 " . ăStep 15:ă&1&"4 4&13 4)205() '02 )"//&- 2Ć16
Checks and Adjustments
Checks and Adjustments
Setup to Check Offset Change with Repetition Rate
W 11801B
Time Mark
Generator
21.21
W W W CSA 803A
Time Mark
Generator
21.21
W W Procedure to Check Offset Change with Repetition Rate
ăStep 1:ă,'1'*'4# 1&# ',01/2+#,1 0#11',%0 1&#, +)# 1&# $-**-3',% 0#15
1',%0 ', 1&# -/"#/ *'01#"
+.*',% #"
,$$ ,
,01/2+#,1 ',$/+#
211-, ./#00
211-, #/'#0 ./#00
Enhanced Accuracy #/'#0 1-2!&
Calibrate All .-.52. +#,2 Recall Defaults
'+# /) #,#/1-/
/)#/ 0#! m0
ăStep 2:ă/#00 1&# 211-, ," 1&#, 1-2!& Level
ăStep 3:ă"(201 1&# Trig Level 2,1'* 1/!# ..#/0
SDĆ24 Service Manual
2Ć17
Checks and Adjustments
ăStep 4:ă-2!& 1&# 3#/1'!* '!-, ," 1&#, 0#1 1&# Vert Size: M1 1+"'3
ăStep 5:ă#1 Vert Offset: M1 0- 1&1 1&# 1/!# '0 3#/1'!**5 !#,1#/#" -,
1&# 0!/##,
ăStep 6:ă#1 1&# 1'+# +/) %#,#/1-/0 /)#/ 0#11',% 1- +0
ăStep 7:ă/#00 1&# 211-, ," 1&#, 1-2!& Acquire Desc
ăStep 8:ă#1 Average N 1- On ," 1&#, 1-2!& Set Avg N
ăStep 9:ă#1 Average N 1- 8 4'1& 1&# 1-. ),- ăStep 10:ă'1 2,1'* 1&# Acquire Desc 0#*#!1-/ ', 1&# +(-/
+#,2 0&-40 1&1 #'%&1 3#/%#0 &3# ##, !-+.*#1#"
ăStep 11:ă/#00 1&# 211-,
ăStep 12:ă-2!& Measurements ," 1&#, Mean ', 1&# Measurements
.-.62. +#,2
ăStep 13:ă-2!& Compare & References ', 1&# +(-/ +#,2
ăStep 14:ă-2!& Save Current Meas Values as References ," 1&#,
0#1 Compare 1- On
ăStep 15:ă#1 1&# 1'+# +/) %#,#/1-/0 /)#/ 0#11',% 1- +0
ăStep 16:ă'1 2,1'* 1&# Acquire Desc 0#*#!1-/ ', 1&# +(-/
+#,2 0&-40 1&1 #'%&1 3#/%#0 &3# ##, !-+.*#1#"
ăStep 17:ă 1&1 DMean -$$0#1 4'1& /#.#1'1'-, /1# '0 " +
ăStep 18:ă-,1',2# 1- "#!/#0# 1&# 1'+# +/) %#,#/1-/0 /)#/ 0#16
1',% ," /#.#1 1#. $-/ #!& 0#11',% "-4, 1- m0
ăStep 19:ă/#00 1&# 211-,
ăStep 20:ă'0!-,,#!1 1&# W 1#/+',1'-, $/-+ 1&# ',.21 ,"
!-,,#!1 '1 1- 1&# ',.21
ăStep 21:ă#.#1 1#.0 1&/-2%& $-/ 2Ć18
Checks and Adjustments
Checks and Adjustments
Part 4
Noise
Measurement Limits (SN B020652 and above)
m
Measurement Limits (SN B010651 and below)
m Setup to Examine Noise
CH 1
50 W Termination
11801B
(not connected yet)
CH 1
12I RF Cable
50 W Termination
CSA 803A
(not connected yet)
SDĆ24 Service Manual
12I RF Cable
2Ć19
Checks and Adjustments
Procedure to Examine Noise
ăStep 1:ă1,6,$/,;( 6+( ,156470(16 5(66,1*5 6+(1 0$.( 6+( )2//29,1* 5(6<
6,1*5 ,1 6+( 24'(4 /,56('
$03/,1* ($'
1)) 1
156470(16 $,1)4$0(
%76621 34(55
Source Internal Clock
# %76621 34(55
# %76621 (4,(5 34(55
Enhanced Accuracy (4,(5 627&+
Calibrate All 323<73 0(17 Recall Defaults
ăStep 2:ă27&+ Loop Gain ,1 6+( Enhanced Accuracy 0(17
ăStep 3:ă,5&211(&6 6+( W 6(40,1$6,21 )420 6+( ,1376 $1' &21<
1(&6 6+( 62 6+( ,1376 6+427*+ 6+( ,1&+ &$%/(
ăStep 4:ă27&+ 6+( &+$11(/ 170%(4 :27 $4( 75,1* Automatic Calibrate,
$1' 6+(1 Proceed ,1 6+( Loop Gain Calibration 323<73 0(17
ăStep 5:ă,5&211(&6 6+( )420 6+( ,1376 $1' 4(&21<
1(&6 6+( W 6(40,1$6,21
ăStep 6:ă4(55 6+( "! %76621 $1' 6+(1 627&+ Acquire Desc.
ăStep 7:ă(6 Average N 62 On
ăStep 8:ă4(55 6+( %76621
ăStep 9:ă27&+ 6+( 8(46,&$/ ,&21 6+(1 5(6 6+( Vert Size: M1 62
0!',8
ăStep 10:ă27&+ Def Tra $6 6+( 623 2) 6+( 5&4((1
ăStep 11:ă1 6+( Vertical Description 323<73 0(17 627&+ 6+( )2//29,1*
5(/(&6245 ,1 6+( 24'(4 *,8(1
Mainframe (4,(5 21/: 1 - Avg ( Mainframe (4,(5
21/: 1 ) Enter Desc
ăStep 12:ă4(55 6+( %76621 $1' 6+(1 627&+ Measurements
ăStep 13:ă27&+ RMS ,1 6+( Measurements 323<73 0(17 $1' 6+(1
RMS ,1 6+( 0$-24 0(17
ăStep 14:ă(6 Data Interval 62 whole zone ,1 6+( RMS 323<73 0(17
ăStep 15:ă 6+$6 RMS ,5 v 0! $1' $%28(
6+$6 RMS ,5 v 0! $1' %(/29
ăStep 16:ă4(55 6+( "! %76621
2Ć20
Checks and Adjustments
Checks and Adjustments
ăStep 17:ă"' Sampling Head Fnc's ! &! %& Smoothing &" On
! & Sampling Head Functions #"#*'# !'
ăStep 18:ă$%% & '&&"!
ăStep 19:ă && & RMS % v m ! "(
&& & RMS % v
m ! ")
ăStep 20:ă#& &#% &$"' "$ !! SDĆ24 Service Manual
2Ć21
Checks and Adjustments
Part 5
Rise Time
Specifications
Setup to Check Rise Time
11801B
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
CSA 803A
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
2Ć22
Checks and Adjustments
Checks and Adjustments
Procedure to Check Rise Time
ăStep 1:ă0+5+#.+:' 5*' +04536/'05 4'55+0)4 5*'0 /#-' 5*' (1..18+0) 4'5;
5+0)4 +0 5*' 13&'3 .+45'&
#/2.+0) '#&
0(( 0
04536/'05 #+0(3#/'
" $65510 23'44
" $65510 '3+'4 23'44
Enhanced Accuracy '3+'4 516%*
Calibrate All 212;62 /'06 Recall Defaults
$65510 23'44
Source Internal Clock
#.+$3#5+10 5'2 '0'3#513
" 48+5%* ăStep 2:ă3'44 5*' $65510
ăStep 3:ă3'44 5*' ! $65510 #0& 5*'0 516%* Horizontal Desc
ăStep 4:ă16%* Main Record Length #0& 5*'0 4'5 Main Record Len 51
8+5* 5*' 512 -01$
ăStep 5:ă16%* Acquire Desc +0 5*' ! /#,13 /'06
ăStep 6:ă'5 Average N 51 On #0& 5*'0 516%* Set Avg N
ăStep 7:ă'5 Average N 51 8+5* 5*' 512 -01$
ăStep 8:ă16%* 5*' *13+:105#. 04&+7
+%10 #0& 5*'0 4'5 5*' Main Size 51
ăStep 9:ă16%* Main Pos #0& 5*'0 Set to Min +0 5*' Numeric Entry &
Knob Res 212;62 /'06
ăStep 10:ă3'44 5*' $65510
ăStep 11:ă16%* Measurements #0& 5*'0 Rise +0 5*' Measurements
212;62 /'06
ăStep 12:ă16%* Rise +0 5*' /#,13 /'06 #0& 5*'0 4'5
Tracking 51 Off +0 5*' Rise 212;62 /'06
ăStep 13:ă'5 5*' Main Size 51 04&+7
ăStep 14:ă16%* Baseline +0 5*' Rise 212;62 /'06
ăStep 15:ă16%* # $.#0- 2135+10 1( 5*' 4%3''0 51 '9+5 5*+4 /'06
ăStep 16:ă'5 5*' Baseline $1551/ -01$ 51 5*' #7'3#)' 1( 5*' $1551/
1( 5*' 26.4' 04 $'(13' 5*' 45'2
ăStep 17:ă16%* 5*' *13+:105#. +%10 #0& 5*'0 4'5 5*' Main Pos 41
5*#5 5*' 45'2 +4 #5 5*' .'(5;/145 '&)' 1( 5*' 4%3''0
SDĆ24 Service Manual
2Ć23
Checks and Adjustments
ăStep 18:ă% % Main Size %! "$'
ăStep 19:ă% % Main Pos $! %% % $%" $ ""#!)%* %#
! % $# ăStep 20:ă!& Rise % !# &
ăStep 21:ă!# % Mean '& % Rise "!",&" & !# %#
&$
ăStep 22:ă&% % $" #$ % (% % !!( !#&
+ +
+ ǸMean : * + + + NOTE
ăStep 23:ă
%% % $" #$ % $ v
"$
ăStep 24:ă"% %"$ %#!& !# 2Ć24
Checks and Adjustments
Checks and Adjustments
Part 6
Acquisition
Aberrations
! " !$! " !"# !"! " # ! " #!"
"!
Measurement Limits
!# " "! #!" "! !" %
#!" " "!
TableĂ2Ć3:ăAcquisition Aberration Specifications
SDĆ24 Service Manual
Time Difference from the
Rising Edge of Waveform
Minimum Specification
" !
v " v
! " !
v " v
! " !
v " v
! #
v " v
! " !
v " v
2Ć25
Checks and Adjustments
Setup to Examine Acquisition Aberrations
11801B
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
,2#.
1--)3
.'%%#.
+-10
+
0+" 3
CSA 803A
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
,2#.
1--)3
.'%%#.
+-10
+
0+" 3
Procedure to Examine Acquisition Aberrations
ăStep 1:ă+'0')'4# 0&# '+/0.1*#+0 /#00'+%/ 0&#+ *(# 0&# $,)),2'+% /#05
0'+%/ '+ 0&# ,."#. )'/0#"
*-)'+% #"
+$$ +
+/0.1*#+0 '+$.*#
100,+ -.#//
100,+ #.'#/ -.#//
Enhanced Accuracy #.'#/ 0,1!&
Calibrate All -,-51- *#+1 Recall Defaults
100,+ -.#//
Source Internal Clock
)' .0',+ 0#- #+#.0,.
/2'0!& 2Ć26
Checks and Adjustments
Checks and Adjustments
ăStep 2:ă+ ,, -# .--)( ( -# ( -).# Acquire Desc
ăStep 3:ă - Average N -) On ( -# ( -).# Set Avg N
ăStep 4:ă - Average N -) 0$-# -# -)* %()
ăStep 5:ă+ ,, -# .--)(
ăStep 6:ă).# -# #)+$2)(-& (,$/
$)( ( -# ( , - -# Main Size -)
ăStep 7:ă - -# Main Pos ,) -#- -# +$,$(" " )! -# ,- * $, - -#
& !-3'),- " )! -# ,+ (
ăStep 8:ă).# -# / +-$& $)( ( -# ( , - -# Vert Offset:M1 ,)
-#- -# / +" )! -# -)* )! -# *.&, -0 ( (, !- + -# ,- *
( -# +$"#- " )! -# ,+ ( $, - -# #)+$2)(-& (- +&$( ăStep 9:ă - -# Vert Size: M1 -) '$/
ăStep 10:ă).# Vert Offset: M1 ( -# ( Fine $( -# Numeric Entry &
Knob Res *)*3.* ' (.
ăStep 11:ă - Vert Offset: M1 ,) -#- -# / +" )! -# -)* )! -# *.&,
-0 ( (, !- + -# ,- * ( -# +$"#- " )! -# ,+ ( $, - -#
#)+$2)(-& (- +&$( ăStep 12:ă -#- -# '"($-. )! -# '1$'.' *),$-$/ (
( "-$/ ++-$)(, -#- ).+ (, !- + -# ,- * $, v / +-$&
$/$,$)(, !+)' -# #)+$2)(-& (- +&$( )! -# ,- * '*&$-. ăStep 13:ă).# -# #)+$2)(-& Ă(,$/
$)( ( -# ( , - -# Main Size -)
ăStep 14:ă - -# Main Pos ,) -#- -# +$,$(" " )! -# ,- * $, - -#
& !-3'),- " )! -# ,+ (
ăStep 15:ă -#- -# '"($-. )! -# '1$'.' *),$-$/ (
( "-$/ ++-$)(, -#- ).+ -0 ( (, ( (, !- + -# ,- *
$, v / +-$& $/$,$)(, !+)' -# #)+$2)(-& (- +&$( )! -# ,- *
'*&$-. ăStep 16:ă - -# Main Size -) *,$/ ( -# ( -# Main Pos ,) -#-# +$,$(" " )! -# ,- * $, - -# & !-3'),- " )! -# ,+ (
ăStep 17:ă -#- -# '"($-. )! -# '1$'.' *),$-$/ (
( "-$/ ++-$)(, -#- ).+ -0 ( *, ( (, !- + -# ,- *
$, v / +-$& $/$,$)(, !+)' -# #)+$2)(-& (- +&$( )! -# ,- *
'*&$-. ăStep 18:ă).# -# #)+$2)(-& Ă(,$/
$)( ( -# ( , - -# Main Size -)
ăStep 19:ă).# -# / +-$& ) $)( ( -# ( , - -# Vert Size:M1 -)
'$/
SDĆ24 Service Manual
2Ć27
Checks and Adjustments
ăStep 20:ă! ! Vert Offset:M1 !! ! # ! ! !
" !$ ! ! ! ! ! ! ! ! &! !
ăStep 21:ă" ! &! ! ! ! Main Size !
ăStep 22:ă! ! Main Pos !! ! ! ! ! !
!' ! ! ăStep 23:ă !! ! !" ! %" !# '
! !! " ! ! ! ! ! v
#! # ! &! ! ! ! !"
ăStep 24:ă !! ! !" ! %" !# '
! !! " ! ! ! ! ! v #! #'
! &! ! ! ! !"
ăStep 25:ă" ! Main Pos ! ! Set to Min !
Numeric Entry and Knob Res '" "
ăStep 26:ă! ! Main Size ! #
ăStep 27:ă" ! #! ! ! Vert Offset:M1 !!
! # ! !! ! " ! ! ! !
&! !
ăStep 28:ă" ! &! #
! ! ! Main Size !
ăStep 29:ă! ! Main Pos !! ! ! ! ! !
!' ! ! ăStep 30:ă !! ! !" ! %" !# !# ! !! " !$ !
! ! ! v#! # ! &!
! ! ! !"
ăStep 31:ă! ! Main Size ! # ! ! Main Pos !!
! ! ! ! ! !' ! ! ăStep 32:ă !! ! !" ! %" !# !# ! !! " !$ !
! ! ! v#! # ! &!
! ! ! !"
ăStep 33:ă! ! !" 2Ć28
Checks and Adjustments
Checks and Adjustments
Part 7
Coincidence Between
Channels
Specifications
Setup to Check Coincidence Between Channels
11801B
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
CSA 803A
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
SDĆ24 Service Manual
2Ć29
Checks and Adjustments
Procedure to Check Coincidence Between Channels
ăStep 1:ă1,6,$/,<( 6+( ,156470(16 5(66,1*5 6+(1 0$.( 6+( )2//29,1* 5(6=
6,1*5 ,1 6+( 24'(4 /,56('
$03/,1* ($'
1)) 1
156470(16 $,1)4$0(
# %76621 34(55
# %76621 (4,(5 34(55
Enhanced Accuracy (4,(5 627&+
Calibrate All 323=73 0(17 Recall Defaults
%76621 34(55
Source Internal Clock
$/,%4$6,21 6(3 (1(4$624
# 59,6&+ ăStep 2:ă4(55 6+( %76621
ăStep 3:ă4(55 6+( "! %76621 $1' 6+(1 627&+ Horizontal Desc
ăStep 4:ă27&+ Main Record Length $1' 6+(1 5(6 Main Record Len 62
9,6+ 6+( 623 .12%
ăStep 5:ă27&+ Acquire Desc ,1 6+( "! 0$-24 0(17
ăStep 6:ă(6 Average N 62 On $1' 6+(1 627&+ Set Avg N
ăStep 7:ă(6 Average N 62 9,6+ 6+( 623 .12%
ăStep 8:ă,5&211(&6 6+( &$/,%4$6,21 56(3 *(1(4$624 4(026( +($' )420
Ă &211(&6 ,6 62 $1' 6+(1 34(55 6+( 1)) %76621
ăStep 9:ă4(55 ăStep 10:ă(/(&6 6+( +24,<216$/ Ă35',8
,&21 $1' 6+(1 5(6 6+( Main Size 62
ăStep 11:ă27&+ Acquire Desc $1' 6+(1 5(6 Average N 62 On ,1 6+(
Acquire Description 323=73 0(17
ăStep 12:ă27&+ Exit
ăStep 13:ă(6 6+( Main Pos 52 6+$6 6+( 56(3 ,5 $3342:,0$6(/; &(16(4('
21 6+( 5&4((1
ăStep 14:ă4(55 6+( %76621
ăStep 15:ă27&+ Trace 2 ,1 6+( Store Trace 323=73 0(17
ăStep 16:ă27&+ Recall Trace ,1 6+( 0$-24 0(17
ăStep 17:ă27&+ STO 1 ,1 6+( Recall Stored Trace 323=73 0(17
2Ć30
Checks and Adjustments
Checks and Adjustments
ăStep 18:ă &#""' ' %'#" &'$ "%'#% %!#' %#!
#""' ' '# " '" $%&& ' " (''#"
ăStep 19:ă%&& ' (''#"
ăStep 20:ă#( Measurements " '" Prop Delay " '
Measurements $#$)($ !"(
ăStep 21:ă#( Prop Delay " ' !#% !"( " '"
Trace 3 " ' Prop Delay $#$)($ !"(
ăStep 22:ă '' ' !"'( # ' Prop Delay & v $&
SDĆ24 Service Manual
2Ć31
Checks and Adjustments
Part 8
Maximum Signal
Voltage
Measurement Limit
Setup to Examine Maximum Signal Voltage
11801B
Calibration
Generator
W CSA 803A
Calibration
Generator
2Ć32
W Checks and Adjustments
Checks and Adjustments
Procedure to Examine Maximum Signal Voltage
ăStep 1:ă1,7,$/,=( 7+( ,167580(17 6(77,1*6 7+(1 0$.( 7+( )2//2:,1* 6(7>
7,1*6 ,1 7+( 25'(5 /,67('
$03/,1* ($'
1)) 1
167580(17 $,1)5$0(
# %87721 35(66
# %87721 (5,(6 35(66
Enhanced Accuracy (5,(6 728&+
Calibrate All 323>83 0(18 Recall Defaults
%87721 35(66
Slope Main Size m6',9
$/,%5$7,21 (1(5$725
03/,78'( 0$;,080 $03/,78'(
(5,2' m6
!$5 $'-8670(17 0,' 5$1*(
ăStep 2:ă28&+ 7+( 9(57,&$/ ,&21 $1' 7+(1 6(7 7+( Vert Offset: M1 62
7+$7 7+( :$9()250 ,6 9(57,&$//< &(17(5(' 21 7+( 6&5((1
ăStep 3:ă(7 7+( &$/,%5$7,21 *(1(5$7256 $03/,78'( 62 7+$7 ,7 ',63/$<6 $
! 3($.>72>3($. 648$5( :$9(
ăStep 4:ă28&+ 7+( +25,=217$/ 16',9
,&21 $1' 7+(1 6(7 7+( Main Size 72
ăStep 5:ă(7 7+( Main Pos 62 7+$7 7+( 326,7,9(>*2,1* 67(3 ,6 :,7+,1
@ ',9,6,21 2) 7+( /()7>0267 ('*( 2) 7+( 6&5((1
ăStep 6:ă5(66 7+( "! %87721
ăStep 7:ă28&+ Acquire Desc $1' 7+(1 6(7 Average N 72 On ,1 7+(
Acquire Description 323>83 0(18
ăStep 8:ă28&+ Set Avg N $1' 7+(1 6(7 Average N 72 :,7+ 7+( 723
.12%
ăStep 9:ă28&+ 7+( 9(57,&$/ ,&21 $1' 7+(1 6(7 7+( Vert Offset: M1 62
7+$7 7+( $9(5$*( 2) 7+( 723 2) 7+( 38/6( $7 16 $)7(5 7+( 67(3 ,6 21 7+(
+25,=217$/ &(17(5/,1(
ăStep 10:ă(7 Vert Size:M1 72 0!',9
ăStep 11:ă28&+ Vert Offset: M1 $1' 7+(1 Fine ,1 7+( Numeric Entry &
Knob Res 323>83 0(18
ăStep 12:ă(7 Vert Offset: M1 62 7+$7 7+( $9(5$*( 2) 7+( 723 2) 7+( 38/6(
$7 16 $)7(5 7+( 67(3 ,6 21 7+( +25,=217$/ &(17(5/,1(
ăStep 13:ă(7 7+( Main Size 72 16',9
SDĆ24 Service Manual
2Ć33
Checks and Adjustments
ăStep 14:ă !! ! !" ! %" !# !# ! !! " !$ ! !
! ! v #! # ! &! !'
! ! !"
ăStep 15:ă" ! &! Ă #
! ! ! Main Size !
ăStep 16:ă! ! Main Pos !! ! ! $! # !
!' ! ! ăStep 17:ă !! ! !" ! %" !# !# ! !! " !$ ! !
! ! v #! # ! &! !'
! ! !"
ăStep 18:ă! ! 2Ć34
Checks and Adjustments
Checks and Adjustments
Part 9
Isolation Between
Channels
Specifications
Setup to Check Isolation Between Channels
11801B
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
CSA 803A
Calibration Step
Generator
Calibration Step
Generator
Calibration Step
Generator
SDĆ24 Service Manual
2Ć35
Checks and Adjustments
Procedure to Check Isolation Between Channels
ăStep 1:ă0+5+#.+9' 5*' +04536/'05 4'55+0)4 5*'0 /#-' 5*' (1..18+0) 4'5:
5+0)4 +0 5*' 13&'3 .+45'&
#/2.+0) '#&
0(( 0
04536/'05 #+0(3#/'
" $65510 23'44
" $65510 '3+'4 23'44
Enhanced Accuracy '3+'4 516%*
Calibrate All 212:62 /'06 Recall Defaults
$65510 23'44
Source Internal Clock
#.+$3#5+10 5'2 '0'3#513
" 8+5%* ăStep 2:ă3'44 5*' $65510
ăStep 3:ă16%* 5*' *13+9105#. Ă24&+7
+%10 #0& 5*'0 4'5 5*' Main Size 51
ăStep 4:ă3'44 5*' ! $65510 #0& 5*'0 516%* Horizontal Desc
ăStep 5:ă16%* Main Record Length #0& 5*'0 4'5 Main Record Len 51
8+5* 5*' 512 -01$
ăStep 6:ă16%* Acquire Desc +0 5*' ! /#,13 /'06
ăStep 7:ă'5 Average N 51 On #0& 5*'0 516%* Set Avg N +0 5*' Acquire
Description 212:62 /'06
ăStep 8:ă'5 Average N 51 8+5* 5*' 512 -01$
ăStep 9:ă3'44 5*' $65510 10 5*' 4#/2.+0)
*'#&
ăStep 10:ă16%* 5*' 7'35+%#. +%10 #0& 5*'0 4'5 5*' Vert Size: M2 51
Ă/ &+7
ăStep 11:ă16%* Acquire Desc +0 5*' ! /#,13 /'06 #0& 5*'0
4'5 Average N 51 On
ăStep 12:ă!#+5 605+. 5*' Acquire Desc 4'.'%513 +0 5*' ! /#,13
/'06 4*184 5*#5 #7'3#)'4 *#7' $''0 %1/2.'5'&
ăStep 13:ă16%* 5*' $65510
ăStep 14:ă16%* Measurements #0& 5*'0 PeakĆPeak +0 5*'
Measurements 212:62 /'06
ăStep 15:ă'%13& 5*' PeakĆPeak /'#463'/'05 (13 .#5'3 64'
ăStep 16:ă3'44 5*' $65510
2Ć36
Checks and Adjustments
Checks and Adjustments
ăStep 17:ă+0 % Measurements *! /%"* PeakĆPeak &* /%"
Measurements ,+,40, )"*0
ăStep 18:ă" +-! /%" PeakĆPeak )".0-")"*/ #+- (/"- 0."
ăStep 19:ă /%/ PeakĆPeak PeakĆPeak v
ăStep 20:ă&. +**" / /%" (&-/&+* ./", $"*"-/+- -")+/" %"! #-+)
*! /%" W /"-)&*/&+* #-+) +**" / /%" (&-/&+* ./",
$"*"-/+- /+ +**" / /%" W /"-)&*/&+* /+ *! /%"*
,-".. /%" *## 0//+*
ăStep 21:ă-".. /%" 0//+*
ăStep 22:ă+0 % /%" %+-&3+*/( Ă,.!&1
& +* *! /%"* ."/ /%" Main Size /+
ăStep 23:ă-".. /%" 0//+*
ăStep 24:ă-".. /%" 0//+*
ăStep 25:ă-".. 0//+*
ăStep 26:ă&/ 0*/&( /%" Acquire Desc ."(" /+- &* /%" )'+)"*0 .%+2. /%/ 1"-$". %1" ""* +),("/"!
ăStep 27:ă-".. /%" 0//+*
ăStep 28:ă+0 % Measurements *! /%"* PeakĆPeak &* /%"
Measurements ,+,40, )"*0
ăStep 29:ă" +-! /%" PeakĆPeak )".0-")"*/ #+- (/"- 0."
ăStep 30:ă-".. /%" 0//+*
ăStep 31:ă" +-! /%" PeakĆPeak )".0-")"*/ #+- (/"- 0."
ăStep 32:ă /%/ PeakĆPeak
PeakĆPeak v
SDĆ24 Service Manual
2Ć37
Checks and Adjustments
Part 10
Output Amplitude
'(0 . /1 0'-30 1'$ 0$12. ,# *(010 1'$ ./-"$#2/$0 1- "'$") 1'$ -21.21
+.*(12#$
Specifications
'$ 0.$"(%(" 1(-, %-/ 1'$ -21.21 +.*(12#$ (0 + " +
Setup to Check Output Amplitude
W 11801B
W CSA 803A
Procedure to Check Output Amplitude
ăStep 1:ă,(1( *(4$ 1'$ (,01/2+$,1 0$11(,&0 1'$, + )$ 1'$ %-**-3(,& 0$15
1(,&0 (, 1'$ -/#$/ *(01$#
+.*(,& $ #
,%% ,
,01/2+$,1 (,%/ +$
!211-, ./$00
!211-, $/($0 ./$00
Enhanced Accuracy $/($0 1-2"'
Calibrate All .-.52. +$,2 Recall Defaults
!211-, ./$00
Source Internal Clock
2Ć38
Checks and Adjustments
Checks and Adjustments
ăStep 2:ă4(55 6+( "! %76621 $1' 6+(1 627&+ Acquire Desc
ăStep 3:ă(6 Average N 62 On $1' 6+(1 627&+ Set Avg N
ăStep 4:ă(6 Average N 62 9,6+ 6+( 623 .12%
ăStep 5:ă27&+ Sampling Head Fnc's ,1 6+( "! 0$-24 0(17
$1' 6+(1 5(6 6+( TDR 62 On
ăStep 6:ă4(55 6+( %76621
ăStep 7:ă27&+ 6+( +24,;216$/ 15',8
,&21 $1' 6+(1 5(6 6+( Main Size 62
ăStep 8:ă27&+ Main Pos $1' 6+(1 Min ,1 Main Pos 323<73 0(17
ăStep 9:ă4(55 6+( # %76621 $1' 627&+ Enhanced Accuracy
$1' (4,(5 24 34(55 6+( #
%76621 ăStep 10:ă27&+ TDR Amplitude 6+(1 Automatic Calibrate $1' 6+(1
Proceed ,1 6+( TDR Amplitude 323<73 0(17
ăStep 11:ă27&+ Cursors $6 6+( 623 2) 6+( 5&4((1
ăStep 12:ă27&+ Cursor Type $1' 6+(1 Horizontal Bars
ăStep 13:ă27&+ Exit 62 (:,6 6+,5 0(17
ăStep 14:ă(6 Cursor 1 623 .12% 62 6+( $8(4$*( 2) 6+( %$5( 2) 6+(
37/5(
ăStep 15:ă(6 Cursor 2 62 6+( $8(4$*( 2) 6+( 623 2) 6+( 37/5( $6 15
$)6(4 6+( 56(3
ăStep 16:ă 6+$6 DV ,5 0! " 0!
ăStep 17:ă4(55 6+( "! %76621
ăStep 18:ă27&+ Sampling Head Fnc's $1' 6+(1 5(6 6+( TDR Polarity
62- ,1 6+( Sampling Head Functions 323<73 0(17
ăStep 19:ă27&+ Exit 62 (:,6 6+,5 0(17
ăStep 20:ă27&+ 6+( 8(46,&$/ ,&21 $1' 5(6 6+( Vert Offset: M1 52 6+$6
6+( 56(3 ,5 &(16(4(' 21 6+( 5&4((1
ăStep 21:ă27&+ Cursors $6 6+( 623 2) 6+( 5&4((1
ăStep 22:ă(6 Cursor 1 623 .12% 62 6+( $8(4$*( 2) 6+( %$5( 2) 6+(
37/5(
ăStep 23:ă(6 Cursor 2 62 6+( $8(4$*( 2) 6+( 623 2) 6+( 37/5( $6 15
$)6(4 6+( 56(3
ăStep 24:ă 6+$6 DV ,5 0! " 0!
ăStep 25:ă(3($6 $// 2) $46 )24 SDĆ24 Service Manual
2Ć39
Checks and Adjustments
Part 11
TDR Aberrations
" ! ! Specifications
#
TableĂ2Ć4:ăTDR Aberration Specifications
Time Difference
from the Rising
Edge of
Waveform
Minimum Specification
≤ ≤
2Ć40
Measurement Limit
≤ ≤
!
≤ ≤
≤ ≤
Checks and Adjustments
Checks and Adjustments
Setup to Check TDR Aberrations
W 11801B
W CSA 803A
Procedure to Check TDR Aberrations
ăStep 1:ă/*4*"-*7& 4)& */3425.&/4 3&44*/(3 4)&/ .",& 4)& '0--06*/( 3&48
4*/(3 */ 4)& 02%&2 -*34&%
".1-*/( &"%
/'' /
/3425.&/4 "*/'2".&
! #5440/ 12&33
! #5440/ &2*&3 12&33
Enhanced Accuracy &2*&3 405$)
Calibrate All 101851 .&/5 Recall Defaults
#5440/ 12&33
Source Internal Clock
ăStep 2:ă2&33 4)&
#5440/ "/% 4)&/ 405$) Acquire Desc.
ăStep 3:ă&4 Average N 40 On "/% 4)&/ 405$) Set Avg N
ăStep 4:ă&4 Average N 40 6*4) 4)& 401 ,/0#
ăStep 5:ă05$) Sampling Head Fnc's */ 4)& ."+02 .&/5
"/% 4)&/ 3&4 4)& TDR 40 On */ 4)& Sampling Head Functions
101851 .&/5
SDĆ24 Service Manual
2Ć41
Checks and Adjustments
ăStep 6:ă-#.. /&# 0//+* *" /+0!& Enhanced Accuracy
*" #-'#. +- ,-#.. /&# 0//+* ăStep 7:ă+0!& TDR Amplitude '* /&# *&*!#" !!0-!4 )#*0
ăStep 8:ă+0!& Automatic Calibrate *" /&#* Proceed '* /&# TDR
Amplitude ,+,60, )#*0
ăStep 9:ă-#.. /&# 0//+*
ăStep 10:ă+0!& /&# &+-'5+*/( *."'1
'!+* *" /&#* .#/ /&# Main Size /+
ăStep 11:ă#/ /&# Main Pos .+ /&/ /&# -'.'*% #"%# +$ /&# ./#, '. / /&#
(#$/6)+./ #"%# +$ /&# .!-##*
ăStep 12:ă+0!& /&# 1#-/'!( '!+* *" /&#* .#/ /&# Vert Offset:M1 .+
/&/ /&# 1#-%# +$ /&# /+, +$ /&# ,0(.# / *. $/#- /&# ./#, '. / /&#
&+-'5+*/( !#*/#-('*#
ăStep 13:ă#/ /&# Vert Size: M1 /+ )"'1
ăStep 14:ă+0!& Vert Offset: M1 *" /&#* Fine '* /&# Numeric Entry &
Knob Res ,+,60, )#*0
ăStep 15:ă#/ Vert Offset: M1 .+ /&/ /&# 1#-%# +$ /&# /+, +$ /&# ,0(.#
/ *. $/#- /&# ./#, '. / /&# &+-'5+*/( !#*/#-('*#
ăStep 16:ă+0!& /&# &+-'5+*/( Ă*."'1
'!+* *" /&#* .#/ /&# Main Size /+
ăStep 17:ă#/ /&# Main Pos .+ /&/ /&# -'.'*% #"%# +$ /&# ./#, '. / /&#
(#$/6)+./ #"%# +$ /&# .!-##*
ăStep 18:ă /&/ /&# )%*'/0"# +$ /&# )3')0) ,+.'/'1# *" *#%6
/'1# #--/'+*. /&/ +!!0- #/2##* *. $/#- /&# ./#, *" /&# -'%&/
#"%# +$ /&# .!-##* '. v 1#-/'!( "'1'.'+*. $-+) /&# &+-'5+*/( !#*/#-6
('*# +$ /&# ./#, ),('/0"#
ăStep 19:ă#/ /&# Main Size /+ ,."'1 *" /&#* .#/ /&# Main Pos .+
/&/ /&# -'.'*% #"%# +$ /&# ./#, '. / /&# (#$/6)+./ #"%# +$ /&# .!-##*
ăStep 20:ă /&/ /&# )%*'/0"# +$ /&# )3')0) ,+.'/'1# *" *#%6
/'1# #--/'+*. /&/ +!!0- #/2##* ,. *" *. $/#- /&# ./#, '.
v
1#-/'!( "'1'.'+*. $-+) /&# &+-'5+*/( !#*/#-('*# +$ /&# ./#,
),('/0"#
ăStep 21:ă+0!& /&# &+-'5+*/( Ă*."'1
'!+* *" /&#* .#/ /&# Main Size /+
ăStep 22:ă+0!& /&# 1#-/'!( '!+* *" /&#* .#/ /&# Vert Size:M1 /+
)"'1
ăStep 23:ă#/ /&# Vert Offset:M1 .+ /&/ /&# 1#-%# +$ /&# /+, +$ /&#
,0(.# / *. $/#- /&# ./#, '. / /&# &+-'5+*/( !#*/#-('*#
2Ć42
Checks and Adjustments
Checks and Adjustments
ăStep 24:ă(-# ,# #(*$1(',% Ă)+$.
$(' ' ,# ' + , ,# Main Size ,(
ăStep 25:ă , ,# Main Pos +( ,#, ,# *$+$'" " (! ,# +, ) $+ , ,#
% !,2&(+, " (! ,# +* '
ăStep 26:ă
,#, ,# &"'$,- (! ,# &0$&-& )(+$,$. **2
,$(' ,#, (-*+ $' ,# !$*+, )+ !, * ,# )($', (! ,# +, ) $+
v
. *,$% $.$+$('+ !*(& ,# #(*$1(',% ', *%$' (! ,# +, )
&)%$,- ăStep 27:ă
,#, ,# &"'$,- (! ,# &0$&-& ' ",$. **2
,$(' ,#, (-*+ $' ,# !$*+, )+ !, * ,# )($', (! ,# +, ) $+
v . *,$% $.$+$('+ !*(& ,# #(*$1(',% ', *%$' (! ,# +, )
&)%$,- ăStep 28:ă , ,# Main Size ,( '+$.
ăStep 29:ă(-# ,# Main Pos + % ,(* ' ,# ' Set to Min $' ,#
Numeric Entry and Knob Res )()2-) & '-
ăStep 30:ă(-# ,# . *,$% $(' ' ,# ' + , Vert Offset:M1 +( ,#,
,# . *" (! ,# (,,(& (! ,# )-%+ , '+ !(* ,# +, ) $+ , ,#
#(*$1(',% ', *%$' ăStep 31:ă(-# ,# #(*$1(',% Ă'+$.
$(' ' ,# ' + , ,# Main Size ,(
ăStep 32:ă , ,# Main Pos +( ,#, ,# *$+$'" " (! ,# +, ) $+ , ,#
*$"#,2&(+, " (! ,# +* '
ăStep 33:ă ,#, ,# &"'$,- (! ,# &0$&-& )(+$,$. ' ' "2
,$. **,$('+ ,#, (-* ,/ ' '+ ' )+ !(* ,# )($', (! ,# +, ) $+ v . *,$% $.$+$('+ !*(& ,# #(*$1(',% ', *%$'
(! ,# +, ) &)%$,- ăStep 34:ă , ,# Main Size ,( )+$. ' ,# ' ,# Main Pos +( ,#,
,# *$+$'" " (! ,# +, ) $+ , ,# *$"#,2&(+, " (! ,# +* '
ăStep 35:ă ,#, ,# &"'$,- (! ,# &0$&-& )(+$,$. ' ' "2
,$. **,$('+ ,#, (-* ,/ ' )+ ' )+ !(* ,# )($', (! ,# +, ) $+ v . *,$% $.$+$('+ !*(& ,# #(*$1(',% ', *%$'
(! ,# +, ) &)%$,- ăStep 36:ă* ++ ,# -,,('
ăStep 37:ă(-# Sampling Head Fnc's ' ,# ' + , ,# TDR Polarity
,( - $' ,# Sampling Head Functions )()2-) & '-
ăStep 38:ă ) , , )+ ,#*(-"# !(* SDĆ24 Service Manual
2Ć43
Checks and Adjustments
Part 12
Reflected Rise Time
&'/ -.0 /&,2/ 0&# /#01- +" )'/0/ 0&# -.,!#"1.#/ 0, !&#!( 0&# .#$)#!0#"
.'/# 0'*#
Specifications
&# /-#!'$'!0',+ $,. 0&# .#$)#!0#" .'/# 0'*# '/ -/
Setup to Check Reflected Rise Time
11801B
I CSA 803A
I Procedure to Check Reflected Rise Time
ăStep 1:ă+'0')'3# 0&# '+/0.1*#+0 /#00'+%/ 0&#+ *(# 0&# $,)),2'+% /#04
0'+%/ '+ 0&# ,."#. )'/0#"
*-)'+% #"
+$$ +
+/0.1*#+0 '+$.*#
100,+ -.#//
100,+ #.'#/ -.#//
Enhanced Accuracy #.'#/ 0,1!&
Calibrate All -,-41- *#+1 Recall Defaults
100,+ -.#//
Source Internal Clock
2Ć44
Checks and Adjustments
Checks and Adjustments
ăStep 2:ă-!.. /$! 0//+* * /$!* /+0$ Acquire Desc
ăStep 3:ă!/ Average N /+ On * /$!* /+0$ Set Avg N
ăStep 4:ă!/ Average N /+ 2%/$ /$! /+, '*+
ăStep 5:ă+0$ Sampling Head Fnc's %* /$! )&+- )!*0
* /$!* .!/ /$! TDR /+ On
ăStep 6:ă-!.. /$! 0//+*
ăStep 7:ă+0$ /$! $+-%3+*/( *. %1
%+* * /$!* .!/ /$! Main Size /+
ăStep 8:ă+0$ /$! Main Pos .!(!/+- * /$!* Set to Min %* /$!
Numeric Entry and Knob Res ,+,40, )!*0
ăStep 9:ă-!.. /$! 0//+* * /$!* /+0$ Measurements
ăStep 10:ă+0$ Fall %* /$! Measurements ,+,40, )!*0 * /$!* Fall
%* /$! )&+- )!*0
ăStep 11:ă!/ Tracking /+ Off * /$!* /+0$ Topline %* /$! Fall ,+,40,
)!*0
ăStep 12:ă+0$ Topline %* /$! )&+- )!*0 * /$!* Fine %*
/$! Numeric Entry & Knob Res ,+,40, )!*0
ăStep 13:ă!/ /$! Topline /+, '*+ .+ /$/ %/ %. ) +1! /$!
Baseline
ăStep 14:ă+0$ /$! $+-%3+*/( %+* * /$!* .!/ /$! Main Pos .+
/$/ /$! -!"(!/%+* ./!, %. / /$! (!"/4)+./ ! #! +" /$! .-!!*
ăStep 15:ă!/ /$! Main Size /+ ,. %1 * /$!* /$! Main Pos /+
!*/!- -!"(!/%+* ./!, +* /$! .-!!*
ăStep 16:ă /$/ Fall -!"(!/! -%.! /%)! %. v
,.
ăStep 17:ă-!.. /$! 0//+*
ăStep 18:ă+0$ Sampling Head Fnc's * /$!* .!/ /$! TDR Polarity
/+ - %* /$! Sampling Head Functions ,+,40, )!*0
ăStep 19:ă+0$ Exit
ăStep 20:ă!,!/ /!,. /$-+0#$ "+- *!#/%1! ,0(.! +/! /$/
(( Fall .!(!/%+*. )0./ ! -!,(! 2%/$ Rise .!(!/%+*. "+- *!#/%1!
,0(.!
ăStep 21:ă!,!/ /!,. /$-+0#$ "+- $**!( SDĆ24 Service Manual
2Ć45
2Ć46
Maintenance
" # # $
Preventive
Maintenance
# !
# # $
# ! # Exterior
! #
!
Periodic Electrical Checks
#
# SDĆ24 Service Manual
3Ć1
Maintenance
StaticĆSensitive Device Classification
CAUTION
$%#&% $! % %# ! %$ %% #
$&$!% % # $%% $# + '$ #%' $&$+
!%%) '# &$ $$$ $ &% #$ %% ' %$ %
# &!# %% '# %$
$#' % ( !#&% $ % ' ăStep 1:ă* $%%+$$%' ! %$
ăStep 2:ă#$! #% $% # % $! $ %# # %+
#$ % $&# # &%' #$! #% % $!
$ (% $ #%+#&% %#% $ % !&%$ ) !
%% %$ $%%+$$%' $$$ # ! %$
ăStep 3:ă$# % $%% ' % # ) &# ) ) (# (#$%
$%#! ( %$ ! %$ #' $%%+$$%'
$$$ # ! %$ $ & !# # ) % $%%+#
( # $%% ) "& $#' !#$ # % &$ % $%% %# % (#$% $%#!
ăStep 4:ă ( % ! #% # $%% #
) &# ( # $%% $&#
ăStep 5:ă
! % ! % $ $ #% % %# ('#
! $$
ăStep 6:ă &! ! %$ ) % ) '# ) % $
ăStep 7:ă % $ % ! %$ '# ) $&#
ăStep 8:ă' ! %$ #$ %% ' $&# '# ! #% $%% #
3Ć2
# # ( #+
Maintenance
Maintenance
TableĂ3Ć1:ăRelative Susceptibility to Electrostatic Discharge (ESD)
Semiconductor Classes
Relative
Susceptibility
Levels1
%( # (% (+ *) %( )(* (+ *) %(
" $( # (% (+ *) - * $&+*) #%)* )$) * ,
%**!. ) $" %)
%**!. /('+$. &%"( *($) )*%()
$( # (% (+ *)
%-/&%-( %**!. ")* )$) * ,
1Voltage
equivalent for levels (voltage discharged from a 100ĂpF capacitor through resisĆ
tance of 100 W:
1Ă=Ă100 to 500 V
6 = 600 to 800 V
2 = 200 to 500 V
7 = 400 to 1000 V (est.)
3 = 250 V
8 = 900 V
4 = 500 V
9 = 1200 V
5 = 400 to 600 V ąą
SDĆ24 Service Manual
3Ć3
Maintenance
Exchanging Sampling Heads
+&)%#'! " #%+ '1 ( ," )*(-*+ #' ,#(' Checks and
Adjustments ( ,"#+ &'-% ,"' #, &1 0"'! (* '/ +&)%#'!
"
&)%#'! " 0"'!+ ' & /#," #,"* 1(-* %(% $,*('#0
+*.# ',* (* ," ',*% $,*('#0 0"'! ',* #' .*,('
*!('
(* &(* #' (*&,#(' (' 0"'!#'! 1(-* +&)%#'! " * * ,( (-%
0"'! #' ,#(' Replaceable Parts
Removing and Replacing the Sampling Head Internal
Circuitry
CAUTION
To avoid damage to the sampling head, set the instrument's ON/
STANDBY switch to STANDBY and remove the sampling head from
the instrument before removing or replacing the internal circuitry.
* (*& ," (%%(/#'! )*(-*+ ,( *&(. ' *)% ," #',*'% #*-#,*1
#' ," +&)%#'! "
ăStep 1:ă&(. ," ' -,,(' 1 !',%1 )-%%#'!
(' ," )%+,# $'( /#," +&%% '%3'(+ )%#*+
ăStep 2:ă&(. ," ,"* +&%% (2#*#. +*/+ (' " +# ( ,"
+&)%#'! "+ +#'! + #!-* 3
ăStep 3:ă&(.Ă,"Ă *(',Ă)'%Ă'Ă,"Ă+#'!Ă *(&Ă,"Ă#',*'%
#*-#,*1
ăStep 4:ă'+,%% ," #',*'% #*-#,*1 #',( ," !*1 +"#))#'! +#'!
ăStep 5:ă,-*' ," #',*'% #*-#,*1 ," #*-#, (* ' ,,"
**#* (* +&)%#'! " 0"'! (* *)#*
ăStep 6:ă( *)% ," #',*'% #*-#,*1 (%%(/ ," *&(.% )*(-*+
#' *.*+ (**
3Ć4
Maintenance
Maintenance
Left Side
Right Side
Figure 3Ć1:ăSampling Head Screw Locations
SDĆ24 Service Manual
3Ć5
Maintenance
Changing the Sampling Head Identification Number
(% &.++.6)-' /1.#%$41% !++.62 7.4 3. #(!-'% 3(% 2!,/+)-' (%!$ )$%-3)&)#!8
3).- -4,"%1 3. &)3 3(% 1%04)1%,%-32 .& 7.41 !//+)#!3).-
(% &.++.6)-' %04)/,%-3 )- !$$)3).- 3. !- %1)%2 .1 %1)%2
)-2314,%-3 !-$ !- 8
!,/+)-' %!$ )2 -%#%22!17 3. /%1&.1, 3()2
/1.#%$41%
H
.1 !-7 .3(%1 #.,/!3)"+% 3(!3 (!2 !-$ !- 88
2%1)!+ /.13 #.-&)'41%$ &.1 H
! 2%1)!+ #!"+%
1.#%$41% 3. (!-'% 3(% !,/+)-' %!$ $%-3)&)#!3).- 4,"%1
ăStep 1:ă )3( 3(% )-2314,%-32 2%3 3. )-23!++ .-% .& 3(% 2(.138#)1#4)3 *4,/%12 !#1.22 3(% 36. /)-2 .- 3(%
),% !2%.-31.++%1 .!1$ (%2% 2(.138#)1#4)3 *4,/%12 !1% +.#!3%$
.- 2%5%1!+ *4,/%1 /)-2 .- 3(% ),% !2%.-31.++%1 ".!1$ ()2
".!1$ )2 +.#!3%$ .- 3(% ".33., .& 3(% )-2314,%-3 !-$ #!- "% !##%22%$
.-#% 3(% ".33., /!-%+ )2 1%,.5%$ %&%1 3. 3(% 2%#3).- )3(% &.1 7.41 )-2314,%-3 &.1 ,.1% )-&.1,!3).- .- !##%228
)-' 3()2 ".!1$ %% )'41% 8 &.1 3(% +.#!3).- .& *4,/%1 J860
Figure 3Ć2:ăA5 Time Base/Controller Board Jumper Location
3Ć6
Maintenance
Maintenance
ăStep 2:ă,,0 1- 0&# 3'0& MS DOS ,-#.0'+%
ăStep 3:ă,++#!0 0&# /#.') ! )# 0, 0&# '+/0.1*#+0/ 6
6 -,.0
),!0#" 0 0&# .#. ,$ 0&# '+/0.1*#+0 ,++#!0 0&# ,0&#. #+" ,$ 0&# ! )#
0, 0&# -,.0 ,+ 0&# ăStep 4:ă+/0)) 0&# 6
*-)'+% #" '+ +4 /*-)'+% &#"
!,*-.0*#+0 '+ 0&# '+/0.1*#+0
ăStep 5:ă#0 0&# 0, +" 0&# /3'0!& 0, ăStep 6:ă$0#. 0&# "'%+,/0'!/ .# !,*-)#0# -.#// 0&# 100,+
+" 0&#+ 0,1!& RSĆ232 Parameters
ăStep 7:ă#0 0&# Baud Rate 0, 4800 Bd 0&# Parity 0, none +" 0&#
Stop Bits 0, 1 '+ 0&# RSĆ232 Parameters -,-61- *#+1
ăStep 8:ă+/#.0 0&# *-)'+% #" 0')'04 ,$03.# $),--4 "'/( -.,2'"#"
'+ 0&'/ *+1) '+0, 0&# 5 ".'2# ,$ 0&# /4/0#* !,+0.,))#.
ăStep 9:ă+ 0&# 04-# a: +" 0&#+ -.#// 0&# .#01.+ ,. #+0#. (#4
ăStep 10:ă4-# id +" 0&#+ -.#// 0&# .#01.+ ,. #+0#. (#4
The PC then displays the following message:
Make sure 11800 RS232 port is set up as follows:
Baud Rate
Parity
Stop bits
4800
none
1
Enter mainframe head number [1..4]
NOTE
When entering the sampling head number, the 11802 Oscilloscope
and the CSA 803 Series Communications Signal Analyzers have
only head number 1 and head number 2. The 11801 Series OscilloĆ
scopes have head number 1 through head number 4. The head
numbers correspond to the sampling head compartments and are
in ascending order (reading from left to right).
SDĆ24 Service Manual
3Ć7
Maintenance
ăStep 11:ă( ',* ,! +&)%"' ! '-&* ,0) "' ,! (**, +&1
)%"' ! '-&* ' ,!' )*++ ,! *,-*' (* ',* $0
! ,!' "+)%0+ ,! (%%(/"' &++ Current ID number is: XXXXXXXX"
Enter new ID number (8 characters max):
NOTE
The X's between the quotes represent the current ID number. Eight
is the maximum number of digits allowed and one is the minimum.
Any character is allowed, except a space ( ) character.
ăStep 12:ă',* (' ,( " !, !*,*+ (* ,! '/ "',"","('
'-&*
! "'+,*-&', /"%% ,!' %+! ,! &++ Change in channel M configuration
(-* ,"&+ , ,! ,() ( ,! +*'
ăStep 13:ă, ,! +/",! ,( ' ,!' +/",! ",
$ ,( ăStep 14:ă( .*"0 ,! '/ "',"","(' '-&* )*++ ,! -,,(' ' ,!' ,(-! Identify
! '/ "',"","(' '-&* '(/ ))*+ -'* Mainframe
Sampling Heads "' ,! System Identification )()1-) &'-
ăStep 15:ă&(. ,! #-&)* ,!, /+ "'+,%% (' "' ,) 3Ć8
Maintenance
Theory of Operation
- #! & '*"-!! #& %& ' & #!
!! & &" # " !%'! '& "*! " !
'" '%+ "('#(' #(&
! (& ! ' $(&'"! " '' & *' ' &'# !%'"%
'(%! " !! (!'"!& & !"% & #! !#(' "' !!& % &'%" & ('!"(&+ %" &! &'%" !%'"% "!'!
*'! ' & #! &" ' "!! '*! ' '*" !!& &
&' ""# ! ! ,%"! ! %' '%"!+ + ' !&'%(!' *' &" (&% !'%'"!
! ' " &' %& ' &'# & !%' !'%!+ "% !! ! ## '" ' !#(' &! #' "% '' !! $(&'"!
#"%'"! " ' & #! & &' (!'"! "% "!'"%! ' #% %+
#(& ! '& %' " #"!!'& & #! #%")& '*" &"!'! !!& #"%'+ " ' "('#(' #(& ! &'
!#!!'+ "% !! & "*& %!' "% "
"! "
'&'! " '*" "(# !& & * & !#!!' '&'! " &"' !&
SDĆ24 Service Manual
4Ć1
Theory of Operation
System Functional
Overview
!", ,-"(' ,+", ' "%%.,-+-, -! &#(+ .'-"('% %($, ( -!
2
&)%"' , " .+ 2
-)
'+-(+
W
*.","-"('
1,-&
+"/
-+( +"/
-+(
'+-(+
*.","-"('
1,-&
-+( ',
-)
'+-(+
(+(&
',-+.&'-
+"%
%1
W
Figure 4Ć1:ăSDĆ24 TDR/Sampling Head Block Diagram
! 2
&)%"' !, -0( "')''- !''%, ! !, "-,
(0' *.","-"(' ' ,-) '+-"(' "+."-+1 ! ,-+( +"/ ," '% +(&
-! "',-+.&'- ('-+(%, -! -"&"' ( -! ,-+( ,,+-"(' -( ! *.","-"('
,1,-& ! ,-+( '+-(+ "' -! ,&)%"' ! ", (&&(' -( (-!
!''%, .+'-"' ,&)%"' ("'"' -0' -! -0( !''%,
! ,-) '+-(+, ' ,,+- ' -"/2 ("' (+ )(,"-"/2 ("' ,-)
"')''-%1 ,"' (-! !''%, 1(. ' )+(+& "+'-"% ' (&2
&(' &( ' -0(2)(+- -"&2(&"' '-0(+$ '%1,",
! +"/ ).%, -+" +, -! "'-+'% ,-) '+-(+, -( ,,+- "-!+ -!
)(,"-"/ (+ ' -"/ -+',"-"(' ( -! ,-) ," '%
! ,-+( ,', ," '% ", )+- ( -! ,-+( ," '% +-.+' -( -! "',-+.2
&'- ! "',-+.&'- &('"-(+, -! -"& .+-"(' ( -! ,-+( +"/,-+(
,', %(() ' #.,-, %1 %"' "'," -! "',-+.&'- -( &"'-"' (++,-+( -"&"' ! *.","-"(' +", -"& ", ), (+ %,, ! ",)%1 "'"'- +",
-"& ", ), (+ %,, ! (&"' *.","-"(' +", -"& ", ), (+ %,,(
',.+ )+()+ -"&"' -0' -! -0( ,-) (.-).-, -! ,(' !''% ",
*.")) 0"-! /+"% %1
4Ć2
Theory of Operation
Theory of Operation
TDR Step Generation
! +,( &*,'* "*-",*0 '&+"+,+ -&%&,$$0 ' & #-+,$ -**&,
+'-* & "' +/",! &","$$0 '* ,! +,( ,! "' +/",! "+
"+ ,' '&-, -**&, ,' ,! '-,(-, !& ,! "' +/",! '(&+ ,!
+,( '-*+ " -* 1
+"%($"" " *% +!'/+ ,! +/",! & ,!
-**&, +'-*
)-"+","'& '"&,
W
/",!
%
-**&,
'-*
Figure 4Ć2:ăStep Generator Simplified Schematic Diagram
-+ ' ,! *!",,-* ' ,! +,( &*,'* ,! '-,(-, .'$, ' ,!
+,( (&+ '& ,! *+"+,& ,' *'-& ' ,! ." -&* ,+,
! '$$'/"& +,"'&+ +*" ,! '(*,"'& /",! +!'*, "*-", &
'(& "*-", & W $'
Operation With a Short Circuit
&","$$0 ,! "' +/",! "+ '&-,"& % "& ,! +,( &*,'*
'-,(-, "+ "&","$$0 +!'*, ,! *+"+,& ,' *'-& "+ W & ,! '-,(-,
.'$, "+ Ă + "& " -* 1
!& ,! "' +/",! '(&+ *.*+1"+ ((*&, *+"+,& ,'
*'-& , ,! )-"+","'& ('"&, & , ,! !&&$ '&&,'* "+ W
-+ ,! "&,*&$ ,*%"&,"'& *+"+,& "+ W & ,! '&&,'*
"%(& "+ W ! .'$, , ,! )-"+","'& ('"&, *"++ ,' %
+ "& " -* 1
250 mV
9V
Figure 4Ć3:ăStep Generator With a Shorted Output
SDĆ24 Service Manual
4Ć3
Theory of Operation
(&"'(#" $&#$(' (# ( '#&( " ( " ' "(* , & (
(# ( %)'(#" $#"( " " ( (&"'(#" (! '$ ,
&#! ( &'( (&"'(#" (# ( '#" (&"'(#" ' ( $&#$(#" (! &#!
( %)'(#" $#"( (# ( '#&( " ( " Operation With a 50 W Load
"( , ( # '+( ' #")(" " ( '($ "&(#& #)($)( '
#""( (# W # ( &''(" (# &#)" ( ( %)'(#" $#"( '
W )' ( "(&" W !$" ! )&&"( '#)&
$ ' ! ( ( %)'(#" $#"( ' " )& -
0V
-250 mV
Figure 4Ć4:ăStep Generation With a 50 W Load
" ( # '+( #$"' &*&'-' ( &()&" $( (# &#)" '
&#" " ( %)'(#" $#"( &'' (# !( !$"
#+' ( %)'(#" $#"( (# &!" ( ' " )& -
Operation With an Open Circuit
"( , ( # '+( ' #")(" " ( '($ "&(#& #)($)( '
#$" ( &''(" (# &#)" ( ( %)'(#" $#"( ' W )' #
( "(&" W !$" ! )&&"( '#)& $ ' !
( ( %)'(#" $#"( ' '(&(" #"(#" ' " )& -
0V
-250 mV
-500 mV
Figure 4Ć5:ăStep Generation With an Open Circuit
" ( # '+( #$"' &*&'-' $$&"( &''(" (#
&#)" ( ( %)'(#" $#"( " ( ( "" #""(#& ' W
)' ( "(&" &)( !$" ' W " ( #""(#& !$" ' W. ' )'' ( %)'(#" $#"( (# &' (# ! ' "
)& -
4Ć4
Theory of Operation
Theory of Operation
*($)*%$ &(%&*) *% * %&$ $ * $ ) ("* ! *%
* '+)*%$ &%$* +)$ * ,%"* * * '+)*%$ &%$* *% () *%
) $ +( / * * '+)*%$ &%$* * *# )&". (%# *
()* )*& *% * )%$ )*& ) * &(%&*%$ *# (%# * '+)*%$
&%$* *% * %&$ $ * , +$( *)* $ !
TDR Amplitude
)$ * / #&"$ ) $*($" )*& $(*%( -* *
'+)*%$ $$" .%+ $ &(%(# #)+(#$*) %+ $ ")%
+)* * #&"*+ % * )*&
)*& #&"*+ )**$ ) ". )*" $ $)$)*, *% *#&(/
*+( ,(*%$) )+"". * ) $%* $))(. *% +)* *) &(#*( ,(.
('+$*".
/ #&"$ %$*$) $%$,%"*" ##%(. ** )*%() *-%
,"+) * *%(. +"* ,"+ $ * +)( ,"+ %( * #&"*+
+)*#$*
SDĆ24 Service Manual
4Ć5
Theory of Operation
Loop Gain
! ! !% ! "!% $ "! #! !! " !$ !$ ! "% $! $ ! "!"! $ ! "! ! ! ! ! ! "!% ! #" ! ! " ! "! #! "!% ! ! #! ! ! ! ! " &
" ! ! $ ! ! #" ! ! "
! "! #! $ !$ ! #" ! ! ! $ #!
" ! ! ! ! #" ! ! "
! ! "! #! $ ! ! ! $ #! #
" & $ ! % ! "! ! ! ! Unity Loop Gain
Insufficient Loop Gain
Excessive Loop Gain
Figure 4Ć6:ăDisplayed Trace With Three Loop Gain Settings
4Ć6
Theory of Operation
Theory of Operation
Offset Null
! "
SDĆ24 Service Manual
4Ć7
4Ć8
Replaceable Parts
#$, , -$)( )(-$(, &$,- )! -# )'*)( (-, -#- + + *& & !)+ -#
3
'*&$(" , ,+$ &)0 ., -#$, &$,- -) $ (-$!2 (
)+ + + *& ' (- *+-,
Parts Ordering
Information
*& ' (- *+-, + /$&& !+)' )+ -#+)."# 2).+ &)& %-+)($1 (
, +/$ (- + )+ + *+ , (--$/ #(" , -) %-+)($1 $(,-+.' (-, + ,)' -$' , ' -) )'')$'*+)/ )'*)( (-, , -# 2 )' /$&& ( -) "$/ 2). -# ( !$)! -# &- ,- $+.$- $'*+)/ ' (-, # + !)+ 0# ( )+ +$(" *+-, $- $,
$'*)+-(- -) $(&. -# !)&&)0$(" $(!)+'-$)( $( 2).+ )+ +
H
+- (.' +
H
(,-+.' (- -2* )+ ') & (.' +
H
(,-+.' (- , +$& (.' +
H
(,-+.' (- ')$!$-$)( (.' + $! **&$&
! *+- 2). )+ + #, ( + *& 0$-# $!! + (- )+ $'*+)/ *+- 2).+
&)& %-+)($1 , +/$ (- + )+ + *+ , (--$/ 0$&& )(-- 2). )( +($("
(2 #(" $( -# *+- (.' +
#(" $(!)+'-$)( $! (2 $, &)- - -# + + )! -#$, '(.&
Module Replacement
# 3
'*&$(" $, , +/$ 2 ').& + *& ' (- ,) -# +
+ -#+ )*-$)(, 2). ,#).& )(,$ +
SDĆ24 Service Manual
H
Module Exchange Ċ ( ,)' , , 2). '2 1#(" 2).+ ').&
!)+ + '(.!-.+ ').& # , ').& , ),- ,$"($!$(-&2 & ,, -#(
( 0 ').& , ( ' - -# ,' !-)+2 ,* $!$-$)(, )+ ')+ $(!)+3
'-$)( ).- -# ').& 1#(" *+)"+' && 1- H
Module Repair Ċ ). '2 ,#$* 2).+ ').& -) ., !)+ + *$+ !- +
0#$# 0 0$&& + -.+( $- -) 2).
H
New Modules Ċ ). '2 *.+#, ( 0 + *& ' (- ').& , $( -#
,' 02 , )-# + + *& ' (- *+-,
5Ć1
Replaceable Parts
Using the
Replaceable Parts
List
)*!' #$'")$# # ) %!! ')( () ( ''# $' &*
')'+! #'()## ) ()'*)*' # )*'( $ ) !() ,!! !% -$*
# ) !! ) #$'")$# -$* # $' $''# '%!"#) %')(
Item Names
# ) %!! ')( () # )" " ( (%') '$" ) ('%.
)$# - $!$# *( $ (% !"))$#( # )" " "- ($".
)"( %%' ( #$"%!) $' *')' )" " #))$# '! )!$# #$$ . # *( ,' %$((!
Abbreviations
'+)$#( $#$'" )$ "'# )$#! )#'( #())*) ()#' 5Ć2
Replaceable Parts
Replaceable Parts
CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER
Mfr.
Code
Manufacturer
Address
City, State, Zip Code
# # "
% # &"
! ! # ! #! ! % " "!
$ !% #" "
! # $ SDĆ24 Service Manual
" # ! $ " 5Ć3
Replaceable Parts
Fig. &
Index
No.
Tektronix
Part No.
Serial No.
Effective Dscont
Qty
Name & Description
"# + # + Mfr.
Code
Mfr. Part No.
&%*!" + &'
'
#%% , &
$" %#"'&
#%% , &
&&!$ (!"(!
'
#%% , &
&%*!" + &'
'
%#"' $"
'
#%% , &
#%% , &
#%% , &
!#( % '&+" !#( % &&, !#( % &&,& %$ ("' +" '!
!%%"'! &'' *%""
#%% , &
STANDARD ACCESSORIES
'%!#+ &#%' %('&!
-)
&!
!"( '(&%&
!"( '&%)&
'%!#+
#!$%&#" !!
'%!#+ #!-$%&#" !! '%!#+&#%'-$%&#" !!
'%!#+&#%'"-!!! ''"#+ #!-!!
''"#+ #!!!! #""% $'&! #!! '# ! -)
&!
$'%%$%"!!! '# ! &&
$'%%$%"!!! '# ! &&
$'%$ !!! '# ! $'%&! ! '# ! $#*% )% -!!
'%!"'#% + '# -
,#+ #!"&*#""! -)
&
$!!
,#+ #!
"&*#""! -)
&
$!!
,#+ #!"&*#""
-)
&
$!!
,#+ #!$&*#""
#!$#""' '&! '
+'(% &!$ " ("'
&'"%
+'(% &!$ " ("'
(%#$"
+'(% &!$ " ("'
("' "#!
+'(% &!$ " ("'
(&'% "
+'(% &!$ " ("'
&*&&
+'(% &!$ " ("'
$"&
OPTIONAL ACCESSORIES
5Ć4
Replaceable Parts
Replaceable Parts
Figure 5Ć1:ăExploded View of the SDĆ24 Sampling Head
SDĆ24 Service Manual
5Ć5
5Ć6