Performance  Check  Procedure
The  initial  front-panel  control  settings  at  the  beginning  of  each  subsection 
prepare  the  instrument for the first  step  of the subsection.  Do each of the 
steps In a subsection completely and in order to ensure the correct control 
settings for steps that follow.  To ensure  performance accuracies stated in 
the  Performance  Characteristics  (Section  6),  let  the  instrument  warm  up 
for 20  minutes  and run the  SELF  CAL  MEASUREMENTS  routine.
To  run the  SELF  CAL  MEASUREMENTS  routine:
Press the CH 1  and CHOP/ALT VERTICAL MODE buttons at the same time 
to display the SERVICE MENU.  Underline and select SELF CAL MEASURE
MENTS by  pressing the ADD button.  Press RUN  (CH 2 button)  to  start the 
routine,  then  QUIT  (CH  4  button)  to  return  to  the  normal  oscilloscope 
mode.
NOTE
Performance  accuracies  are  ensured  only  when  the  SELF  CAL 
MEASUREMENTS  is done AFTER  the  20-minute warmup.
7-2
2245A  Operators