Maintenance
and
Calibration
—
Type
114
1
µsec
period
adjust C115F
R125
PERIOD
CAL
T281
Primary
connections
WIDTH
CAL
R180
100
nsec
width
adjust
C195F
+25-VOLT
SUPPLY
+35-VOLT
SUPPLY
+25 VOLTS
ADJUST
R290
Fig.
4-3,
Type 114 chassis, bottom view.
2.
Check
+35-volt unregulated supply
a.
Change
the
VOM
positive
lead
to
the
positive
terminal
of
C298.
b.
Check
that
the
meter
reads
4-33
volts
4 2
volts.
Fig.
4-4. +25 volt supply adjustment.
3.
Check
voltage across D209
a.
Change
the
VOM
positive
lead
to
the
junction
of D208,
R2
0
9
and D209.
b.
Check
that
the
meter
reads
+3 volts ±½
volt from
the
junction
to
chassis
ground.
4.
Check +25-volt supply
regulation
a.
Change
the
VOM
positive
lead
to
the
outside
shell
of
C298.
Chock
that
the
meter
reads
+2
5
volts
±0.5
v.
b.
Using
the
variable
line
voltage
source,
vary
the
line
volt
age
from
94.5
to 137.5
volts.
c.
Check
that
the
VOM
reading
does
not
change more
than 0.5 v while
the
line
voltage is varied
over
the
range
specified.
d.
Return
the
variable
line
voltage
source
to
115
volts.
5.
Check +25-volt supply
for ripple
a.
Remove
the
VOM
leads.
Remove
the
50
Ω
termination
from
the
Type
1A1 input
but
leave
it
connected
to
the
coax
cable.
b.
Connect
a
1X
probe
to
the
Type
1A1 Channel
1
input.
c.
Set
the
test
oscilloscope
for
line
triggering.
Using
the
1
X
probe,
check
that
the
ripple
on
the
outside
shell
of
C298
does
not
exceed
10
millivolts.
Check
only for
60-
or
120-
cycle
ripple;
disregard
the
various
transients
noted.
d.
Set
the
variable
line
voltage for
94.
5
volts
and again
check
that
the
ripple
does
not
exceed
10
millivolts.
e.
Return
the
variable
line
voltage
source
to
115
volts
and
remove
the 1X
probe from C298
and
from
the
Type
1A1
Channel 1 input.
4-5
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 ...