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Maintenance
and
Calibration—
Type
114
Fig.
4-2. Initial control
settings for calibration.
Preliminary
Procedure
(no power applied)
1.
Check
the
Type
114
front-p
a
nel
controls
for
smooth
mechanical
operation,
proper indexing, and
knob
spacing.
Correct
all
defects
found.
2.
Remove
the
Type
114
from
its
cabinet
and
check
for
loose
hardware.
3.
Check
to
see that the
proper
fuse
is
installed (0.3a
slo-blo
for
115-volt
operation,
0.15a
slo-blo
for
230-
volt
operation).
4.
Set
the
Type 114 front-panel
controls
as
shown in
Fig. 4
2.
c.
AMPLITUDE
...............
3
to
10
V, + polarity
VARIABLE
...............
fully
clockwise
d.
POWER
.......................
off
e.
TRIGGER
.................... LEADING
EDGE
5. Using
the
VOM,
check
the
resistances
between
chassis
ground
and
the
points
indicated
in
Table
4-1
(see
Fig.
4-3).
TABLE
4-1
Circuit
Check
Points
Approximate
Resistance
T281
Primary
Terminals
1
thru
4
infinity
+
25-volt
supply
Outer
shell of C298
1.5
K
+35-volt
supply
C298
+
terminal
2
K
Checks and
Adjustments
NOTE
Control
settings
and
test
conditions
for
each
step
are
the
same
as
for
the
preceding
step
unless
otherwise
noted.
1.
Adjust
+25-volt supply
9
a.
Set
all
controls
as
shown
in
Fig.
4-2
b.
Install
the
50 Ω
termination
(T
e
ktronix
Part
No
011-049)
on
the
Type
1A1
Channel
1
input.
Connect
a
50
Ω
coax
cable
between
the
Type
1
14
OUTPUT
connector
and the
termination.
c.
Connect the
Type
114 power
cord
to
a
variable
line
voltage
source
and
set
the
input
voltage
to
the
Type
114
at
115
volts.
d. Turn
on
the equipment and
allow
a
5
minute warm
up
before
proceeding
e.
Slowly
rotate
the WIDTH
VARIABLE
control
clock
wise
until
the
WIDTH
>
PERIOD light
is
lit. Rotate
the
WIDTH
—
VARIABLE
control counterclockwise
to
the point
where
the
WIDTH
>
PERIOD
light
just
extinguishes.
f.
Connect
the
VOM
negative
lead
to
chassis
ground.
Connect
the positive lead
to
the outside
shell
of
C298 (see
Fig.
4-4).
g.
Adjust
R290
(-f-25
VOLTS)
until
the
meter
reads
-f-25
volts
±0.5
volt.
4-4
Summary of Contents for 114
Page 3: ...Type 114 Type 114 Pulse Generotor ...
Page 8: ...Operating Instructions Type 114 Fig 2 1 Front panel control Fig 2 2 Type 114 rear ponel 2 2 ...
Page 10: ...NOTES ...
Page 14: ...NOTES ...
Page 28: ...Maintenance and Calibration Type 114 Fig 4 20 Locations of electrical components 4 14 ...
Page 30: ...Parts List Type 114 EXPLODED VIEW 5 2 ...
Page 45: ...TYPE 114 PULSE GENERATOR ...
Page 46: ...PULSE GENERATOR ...
Page 47: ...TYPE IM PULSE GENERATOR c ...
Page 48: ...SW282 POWER SUPPLY CMD OUTPUT AMPLIFIER 4 POWER SUPPLY ...