UNDER COMPENSATED
OVER COMPENSATED
FIG. 1
Controls
initially set
[10] Set vertical volts/division
switch to display 4 or more
divisions of signal
selected
Scope
probe
compensated
[11] See FIG. 1. Compensate probe by
channel 1 scope probe to
1 kHz square wave
scope’s calibration output
[9] See CAUTION 1. Connect
and sync scope to this
using small screwdriver to turn
trimmer capacitor in probe
housing
AND
AND
and set vertical volts/
divisions switch to display
[6] Set vertical mode switch
[7] Set horizontal controls for
normal internal trigger
[8] Set horizontal time base
to 0.5 ms
[3] Select one
oscilloscope
Scope
would be 50 mv)
0.5 volts/division (typical
set to full bandwidth
less ground leads
X10 probes with 4-inch or
switch, make sure switch is
to select channel 1
CALIBRATE SCOPE
[4] If scope has bandwidth
[5] Connect probe to channel 1
setting with 10X probe
AND
[2] See NOTE 1. Obtain at least
two good 6-foot, 12.5pf,
[1] Warm up three (150 MHz or higher)
oscilloscopes (1-hour warmup
preferred)
CORRECTLY COMPENSATED
NOTE 1
pf, X10 probes with
CAUTION 1
Improper scope
calibration can
affect service
Two 2-meter, 13.0
are not available
used if 6-foot probes
ground leads may be
4-inch or less
DLP
PAGE 1 of 4
234-151-013
529
Issue 8
DEC 1995
