Operating instructions

Performance
Check and Adjustment----7887
HORIZON
Equipment Required :
(Refer to Table 5-1, Test Equipment .)
CONTROL
SETTINGS
Set the 71387 controls as
follows :
`TRIGGERING
MODE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AUTO
SLOPE . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +
COUPLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC
SOURCE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .INT
SWEEP
POSITION . . . . . . . . . . . . . . . . . . . . . . . . . .
Midrange
TIME/DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
ms
VARIABLE . . . . . . . . . . . . . . . . . . . . . .
IN (calibrated)
MAG . . . . . . . . . . . . . .
. . . .
.
.
. . .
. . . . . . . . . . . . . . X1
HOLD OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MIN
5- 1 0
1 .
Oscilloscope mainframe .
2 . Test
oscilloscope .
3 .
Amplifier plug-in units .
4 . Time-base plug-in unit .
5 .
Time-mark generator .
6 . Frequency
counter .
7
. Pulse generator .
BEFORE
YOU BEGIN, see

E z ; i

"x lN

in the Diagrams section .
B1 . SET BASIC
SWEEP CALIBRATION
a . Remove
the 71387 from the oscilloscope mainframe
and install the plug-in extender
in the A horizontal
compartment . Then,
install the 71387 in the plug-in
extender . Install a time
base in the B horizontal
compartment
. Set the horizontal mode switch to
display the
A horizontal plug-in compartment .
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 .
J
PerformanceRequirement check ; see
introductory information .
8
. Digital multimeter .
9
. Plug-in extender .
10
.

1 X probe .
11 . 50-ohm cables (2) .
12 . 50-ohm termination .
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 SWP
CAL adjustment for exactly
1 marker/
division over the center 8 divisions (position
as necessary)
.
./ B2 . CHECK SWEEP LENGTH
AND
POSITIONING RANGE
a .
Horizontally position the display to place the second
time marker to the first graticule line .
J b . CHECK----That the end of sweep is beyond 9 .2
graticule divisions (indicates sweep
length
of at least
10 .2 divisions) .
c . Set
the POSrriON and FINE controls fully clockwise .
J d . CHECK---The start of sweep must be to the right of
graticule center .
e . Set the POSITION and FINE controls
fully
counterclockwise .
J f . CHECK---The
end of sweep must be to the left of
graticule
center .