Maintenance
and
Calibration—
Type
114
Fig.
4-17. Test setup for checking external triggering
16.
Check external triggering and trigger out
put
operation
a. Set
the
Type
114
PERIOD
control
to
1
µS,
s
et
the
WIDTH
control
to
100
nS and
set
the
VARIABLE
controls
to
CAL.
b.
Connect
a 50 Ω
coax
from
the
Type
180A
MARKER
OUT connector to
the
Type
114
EXTERNAL
TRIGGER
—
IN
PUT
connector.
Set
the
Type
180A
for
1
microsecond
markers.
c.
Connect a
50
Ω
coax
from
the
Type
114
TRIGGER
OUT
PUT
connector
to
the
Type
1A1
Chonnel
1
input
(see
Fig.
4-17). Set
the
Type
1A1
MODE
switch
to
CH
1.
Set
the
Type
1A1
Channel
1
VOLTS/CM
switch
to
1.
d.
Set
the
Type
547
TIME/CM
IB]
switch
to
1
µSEC
and
adjust
the
TRIGGER
LEVEL
control
for
a
stable
display.
Check
for
1
pulse/cm
of
3
volts
amplitude
±1
volt.
e.
Insert
the
50
Ω
termination
between
the
coax
and
the
Type
1A1
Channel
1
input
connector.
Change
the
Channel
1
VOLTS/CM
switch
to
.2.
The
amplitude
of
the
trigger
pulse
from
the
Type
114
should
now
be
between
0.4
and
0.7
volt
as
measured
on
the
crt.
f.
Switch
the
Type 114
TRIGGER
switch
back
and
forth
between
LEADING
EDGE
and TRAILING
EDGE.
The
display
on
the
crt
should
flicker
slightly
and
show
minor differences
between
the
leading
edge
and
trailing
edge
trigger
pulses.
g. Turn
the
Type 114 PERIOD
control
to EXTERNAL
TRIG
GER
and
note
that
the
display
remains
the same.
Return
the
PERIOD
control
to
1
µS
17.
Check
pulse
risetime, falltime, and aber
rations
a.
Set
the
Type
547 TIME/CM (B
)
switch
to
.2 µ
SEC.
Set
the
Type 1A1 VOLTS/CM
switch
to
2.
b.
Remove
the
50
Ω
coax
from
the
Type
114
TRIGGER
OUTPUT
connector
and
connect
it
to the
OUTPUT
connector.
Check
to
sec
that
the
50
Ω
termination
is
between
the
50
Ω
coax
and
the
Type 1A1
Channel
1
input
connector.
Set
the
Type 114
AMPLITUDE
control
for
maximum
positive output.
c.
Obtain
stable
triggering
and
adjust
the
AMPLITUDE
—
VARIABLE
control for
5
cm
of
vertical
deflection.
d.
Rotate
the
Type
114
WIDTH —
VARIABLE
control
for
2
complete
cycles
in
the 10
cm of
the
graticule
(see Fig.
4-18).
e.
Check
that
the
aberrations,
such
as
those
shown
in
Fig.
4-18
do
not
exceed 5%
peak-to-pe
a
k
(2’/
2
mm
or
1
'/4
minor
graticule
division).
f. Change
the
AMPLITUDE
switch
to
—
3
to
10
V
and
re
peat
the aberration
check.
g.
Change
the
AMPLITUDE
switch
back
to
+3
to
10 V.
Change
the
Type
547
TIME/CM
(B)
switch
to
.1
µ
SEC
and
obtain
a stable
display.
4-11
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 ...
