Operating instructions

Performance Check and
Adjustment-71380
Control Settings
Set the 71380 controls as
follows :
5- 8
BEFORE
YOU BEGIN, see
TRIGGERING
MODE
AUTO
COUPLING AC
SOURCE INT
SWEEP
POSITION
TIME/DIV
VARIABLE
MAG
HOLDOFF
Midrange
1 ms
IN (calibrated)
X1
MIN
B1 . SET BASIC SWEEP
CALIBRATION
a .
Remove the 71380 from
the oscilloscope mainframe
and install the plug-in
extender in the B horizontal com-
partment . Then, install
the 71380 in the plug-in extender .
b . Connect the
time-mark generator to the
amplifier
unit input with a
50-ohm cable . Set the time-mark
generator
for 1-millisecond markers . Set
the mainframe
intensity
and focus for the desired display .
c . Set the LEVEL control for a
stable display (TRIG'D
light on) . Set the
amplifier unit for approximately a
2-
division
display centered vertically on
the graticule .
d . Set the front-panel
SWPCAL adjustment for exactly
1 marker/division over
the center 8 divisions (position as
necessary) .
Performance Requirement
check see introductory
information .
B . HORIZONTAL SYSTEM
Equipment Required
1 . Oscilloscope
mainframe .
2 . Amplifier plug-in unit .
3 . Time-mark generator .
4 . Plug-in extender .
5 . 50-ohm cables (2) .
6 . 50-ohm
termination .
TEST POINT
AND
ADJUSTMENT
LOCATIONS
in the Diagrams
section .
~/ B2 . CHECK SWEEP
LENGTH AND POSITIONING
RANGE
a . Horizontally position
the display to place
the second
time marker to
the first graticule line .
~/ b . CHECK-That the end of
sweep is beyond 9 .2 grati-
cule divisions (indicates
sweep length of at least 10 .2
divisions) .
c . Set the
POSITION and FINE controls fully
clockwise .
~/ d . CHECK-The start
of sweep must be to
the right of
graticule center
.
e . Set the
POSITION and FINE controls
fully counter-
clockwise .
~/ f .
CHECK-The end of sweep must be to
the left of
graticule
center .
~/ B3 .
CHECK/ADJUST MAGNIFIER
GAIN AND REGIS-
TRATION (13430, 13445)
.
a .
Set the time-mark generator
for 0 .1-millisecond
markers .
b .
Set the MAG switch to X10 and
set the POSITION
controls to midrange . Set the
mainframe intensity con-
trols for the desired display .
c . Check for 1 marker/division
over the center 8
divi-
sions of display (position
as necessary) .