Tektronix SD-14 User manual

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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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 &+42/.*8 .$ &"6&24/. 2&(/. 
 &+42/.*8 .*4&% *.(%/- 4% /.%/.
 /.9&+42/.*8 "0".
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2*.4&% *. 
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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 Service Manual
i
Table of Contents
List of Figures iii...............................................
List of Tables v................................................
General Information
General Information 1Ć1.........................................
Introduction 1Ć1.............................................
Safety Summary 1Ć2.........................................
Installing and Removing the Sampling Head 1Ć4...............
Packing for Shipment 1Ć7....................................
Operating Environment 1Ć8...................................
Checks and Adjustments
Checks and Adjustments 2Ć1.....................................
Test Equipment 2Ć3..........................................
Using These Procedures 2Ć5.................................
$"!  "! # '
"&  "  ""! '
# "!  !# " #! '
"# #!" "! '
ProcedureĂ1 Power On 2Ć8...................................
ProcedureĂ2 Rise Time 2Ć10...................................
ProcedureĂ3 Aberrations 2Ć13.................................
ProcedureĂ4 Offset/Sampling Repetition Rate 2Ć17..............
ProcedureĂ5 Linearity/Gain 2Ć22...............................
ProcedureĂ6 Displayed Noise 2Ć28.............................
ProcedureĂ7 Time Delta 2Ć30..................................
Maintenance
Maintenance 3Ć1................................................
Preventive Maintenance 3Ć1..................................
  "  ! '
""'!"$ $ !!" '
%  ! '
Table of Contents
Contents
ii
      
 
      
Theory of Operation
Theory of Operation 4Ć1.........................................
System Functional Overview 4Ć1..............................
Offset Null and Offset Gain 4Ć2...............................
Replaceable Parts
Replaceable Parts 5Ć1...........................................
Parts Ordering Information 5Ć1...............................
Using the Replaceable 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
Protective
ground (earth)
terminal
ATTENTION
Refer 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
Removing the
Sampling Head
General Information
SDĆ14 Service Manual
1Ć5
TableĂ1Ć1:ăMainframe Executive Processor and Time Base/
Controller Firmware Versions Compatible with the SDĆ14
Mainframe Instrument Firmware Version for SDĆ14 Operation
   #% "*%
 #%    #% "*%
 #%    #% "*%
' &' #" &!$ "  !(&'  "&'  " "  %& #%  
%& "&'%(!"' '# &!$  &" &
CAUTION
To prevent damage to the sampling head or instrument, never
install or remove a sampling head when the instrument's
PRINCIPAL POWER SWITCH is 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 Manual
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
/