Tektronix SD-14 User manual

Service Manual
SD-14
Sampling Head
070–8285–01
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 per-
forming service.
Please check for change information at the rear
of this manual.
First Printing: May 1993

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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.

SDĆ14 Servi e Manual i
Table of Contents
List of Figures iii...............................................
List of Tables v................................................
General Information
General Information 1Ć1.........................................
Introdu tion 1Ć1.............................................
Safety Summary 1Ć2.........................................
Installing and Removing the Sampling Head 1Ć4...............
Pa king for Shipment 1Ć7....................................
Operating Environment 1Ć8...................................
Che ks and Adjustments
Che ks and Adjustments 2Ć1.....................................
Test Equipment 2Ć3..........................................
Using These Pro edures 2Ć5.................................
$"!  "! # '
"&  "  ""! '
# "!  !# " #! '
"# #!" "! '
Pro edureĂ1 Power On 2Ć8...................................
Pro edureĂ2 Rise Time 2Ć10...................................
Pro edureĂ3 Aberrations 2Ć13.................................
Pro edureĂ4 Offset/Sampling Repetition Rate 2Ć17..............
Pro edureĂ5 Linearity/Gain 2Ć22...............................
Pro edureĂ6 Displayed Noise 2Ć28.............................
Pro edureĂ7 Time Delta 2Ć30..................................
Maintenan e
Maintenan e 3Ć1................................................
Preventive Maintenan e 3Ć1..................................
  "  ! '
""'!"$ $ !!" '
%  ! '

Table of Contents
Contents
ii
      
 
      
Theory of O eration
Theory of O eration 4Ć1.........................................
System Functional Overview 4Ć1..............................
Offset Null and Offset Gain 4Ć2...............................
Re laceable Parts
Re laceable Parts 5Ć1...........................................
Parts Ordering Information 5Ć1...............................
Using the Re laceable Parts List 5Ć2..........................

SDĆ14 Service Manual iii
List of Figures
$".+ 43'*&$("   )'*+-' (-, $( (  ( 
 4
$".+ 43(,-&&$("  '*&$("   $( ( (,-+.' (- 4
$".+ 43)-$)(, )! )(-+)&, ( )(( -)+, )( $(!+'
(,-+.' (-, 4
$".+ 43 ')/$(" (  *&$(" -# '*&$("   (- +(&
$+.$-+2 4
$".+ 43 $' , )(-+)&& + )+ .'* + )-$)( 4
$".+ 434 &)% $"+' 4
$".+ 431*&)  $ 0 )! -# 4 '*&$("   4

  

iv

SDĆ14 Service Manual v
List of Tables
&!465%(",'! 2!/.%0! ,)!--), ( %'! -!
)(.,)&&!, %,'1,! !,-%)(- )'*.%&! 1%.$ .$! 6 6
&!465!-/,!'!(. %'%.- ( *!%"%.%)(- 6
&!465!-. +/%*'!(. 6
&!465!,,.%)( !-/,!'!(. %'%.- 6
&!465!-/,!'!(. %'%.- "), ""-!. 6
&!465. "), &/&.%)( )" %( ( %(!,%.3 6
&!465!&.%0! /-!*.%%&%.3 .) &!.,)-..% %-$,#!  6

  

vi

 

SDĆ14 Service Manual 1Ć1
General Information
$ $%  '$  %  #%   % !!) ! (# % % +
! 
%)  #%  $ ( $  #%   $%  # ' %
$!  !  # $!%  '# %  % $ $&
$ !#% %!#%&# $ & #
      $ $  # &$ ) "&
$#' !#$  %  %$  #%  $$#) %   %
% + ! 
 + !  $  %( + !# +"&!! $! 
%%   $%  % #$ % ! $ $ !$ %
+ &%+ %  %   #$  &% $ 
)*#$
Introduction

General Information
General Information
1Ć2
  "       "    $
      !   !  
   ! " "  "    
"
Terms in Manuals
CAUTION    "     
        "
WARNING    "     
   "    
Terms on Equipment
CAUTION      " #  "
        #  "  
 
DANGER      " # " $
     
Symbols in Manuals
Static Sensitive Devices
Symbols on Equipment
DANGER
High Voltage
P otective
g ound (ea th)
te minal
ATTENTION
Refe to
manual
Grounding the Instrument
          
 !         !  
 " !         
   $  " !"    $
   !      
Danger Arising from Loss of Ground
     $     
      "     
   
Safety Summary

General Information
SDĆ14 Service Manual 1Ć3
Do Not Operate in Explosive Atmospheres
            
 

General Information
General Information
1Ć4
 / !$ "  ' ' "(# ( #" # ( &#"(/$" #!$&(/
!"(' # "  &' ( !$ " ' #'#$ #&   &'
#!!)"(#"' " " -.& )& / '#+' ( &#"( $" # (
 "   "'(&)!"(' " ( #(#"' # ( '!$ " 
#!$&(!"('
11801B
CSA 803A
Sampling Head
Compartments
Sampling Head
Compartments
Power Only Sampling
Head Compartments
Figure 1Ć1:ăSampling Head Compartments in an 11801B and a
CSA 803A
 !"&! "'(&)!"( !)'( * &!+& #!$(  +( ( /
 / '#+' ( !"&! ,)(* &#''#&  " ! '
#"(&# &  &!+& *&'#" &%)& " #&& (# #$&( ( /
Installing and
Remo ing the
Sampling Head

Gene al Info mation
SDĆ14 Se vice Manual 1Ć5
TableĂ1Ć1:ăMainf ame Executive P ocesso and Time Base/
Cont olle Fi mwa e Ve sions Compatible with the SDĆ14
Mainf ame Inst ument Fi mwa e Ve sion fo SDĆ14 Ope ation
   #% "*%
 #%    #% "*%
 #%    #% "*%
' &' #" &!$ "  !(&'  "&'  " "  %& #%  
%& "&'%(!"' '# &!$  &" &
CAUTION
To prevent damage to the ampling head or in trument, never
in tall or remove a ampling head when the in trument'
PRINCIPAL POWER SWITCH i ON (poweredĆon).
' '  &*' &' '#  $  ' &!$ "  " 
#!$%'!"' " & #* + $(& ' " *' %! $%&&(% " ' &!$ "
 & &' '(%" ' #,#*" &%* '# ''" ' &!$ "  "'#
$ 
# %!#) ' &!$ "  %#! " "&'%(!"' &' "&'%(!"'&
 &*' '#  (%" ' #,#*" &%* " '"
& #* + $( #(' ' &!$ " 

General Information
General Information
1Ć6
Sampling
Head
Lock Down
Screw

Figure 1Ć2:ăInstalling a Sampling Head in an Instrument

General Information
SDĆ14 Service Man al 1Ć7
 $#''  '* " &)' ( #&" &(#" " $" (# $
( '!$ "  +" '$$" ( - #!!& (&"'$#&((#" ((
$&#((* #*&' (# ( $&# "$)('
((  ( (# ( '!$ "   ( ' '$$ (# -#)& # (&#",
'&* "(& #& '&* #& &$& " ) ( # #+" "#&!(#" #" (
(
H! " &'' # ( "'(&)!"( " '!$ "  #+"&
H! #  $&'#" ( -#)& &! +# "  #"(( #)( ( "'(&).
!"( " '!$ " 
H#!$ ( "'(&)!"( " '!$ "  (-$ " '& ")!&
H '&$(#" # ( '&* &%)&
 ( '!$ "  ' # #+'  ( #&" $ ' "#( * .
  #& ' "#( ( #& )'
ăStep 1:ă(( $&#((* #*&' (# ( $&# "$)('
ăStep 2:ă("  #&&)( &#& &(#" +( "' !"'#"' (
'( ', "'  ! &(& (" ( '!$ "  !"'#"'
'  &(#" +(  )&'(" ('( '(&"( # ( '(  $#)"' $&
'%)& "
ăStep 3:ă# " +&$ ( $&#' '$&( - &#! (  +( "(.
'(( '(" #& (' %)* "(
ăStep 4:ă) - +&$ ( '!$ "  +( "('(( '(" #& ('
%)* "( (# $&#(( ( "'
ăStep 5:ă( - $ ( $&# $  #"' ( 
ăStep 6:ă( - $ )"" #& )&(" #! (+" ( &(#" "
( '!$ "  (# )'#" ( '!$ "  #"  ''  #+
(& "' # $" #"  '
ăStep 7:ă ( &(#" +( '$$" ($ #& +( ")'(& '($ '
ăStep 8:ă& ( &'' # ( (&#", '&* "(& " -#)& &()&"
&'' #" ( &(#" " #" #& !#& $&#!""( $ '
Packing for Shipment

General Information
General Information
1Ć8
 % $ " # "!    $ " !#   
 "   !  
Operating Temperature
 " " !  %  " " " "#  ! "% _
 _ "  " !   " " "# !   _
" _ " !"  " " "# ! #"! "  " "! %
" !!! "  "  " " "#     &
% 
 # &  " !" #" ! $ "  '#" % '#
  " " & "  # & " !" #" $ "! " '
 # &  " "  !" #" " "#  !  
" "_   " !  ! $   " !" #"
Operating
Environment