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Teletype 28 - Page 100

Teletype 28
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SECTION
573-118-700TC
3.
20
Contact
Timing
Measurements
(To
Zero
Test
Set) (continued)
MIN 35 DIV
TRACE
OF
RIGHT SIDE
OF
REAR
CONTACT
MIN
35
DIV
(3)
Requirement
(rear
contact)
Connect
neon
trace
to
right
side
of
rear
contact
(normally
open when
unit
is
in
idle
condition).
With
unit
receiving
LETTERS
code
combinations,
observe
trace.
(a)
Latest
end
of
trace
minimum
of
35
divisions
before
earliest
end
of
trace
of
right
side
of
front
contact
recorded
in
requirement
(1).
(b)
Minimum
trace
length
111
divisions.
(c)
Earliest
start
of
trace
minimum
of
35
divisions
after
latest
start
of
trace
of
right
side
of
front
contact
recorded
in
requirement
(1).
(d)
Bounce
should
end
within
maximum
5
divisions
of
earliest
start
and
latest
end
of
any
trace.
(4)
Requirement
(applies
only
if
complete
transfer
contact
is
used)
Connect
neon
trace
to
both
sides
of
rear
contact.
Observe
trace.
Break
in
trace
at
two
places
to
indicate
break
before
make
Min
10
divisions
To
Adjust
(1)
If
trace
lengths
under
(1) (c)
and
(3) (b)
are
both
short,
refine
CONTACT BRACKET
(3.
08)
adjustment.
If
only
one
trace
is
short,
refine
CONTACT BACKSTOP (3. 09)
adjustment
and
check
RIGHT CONTACT
GAP
(3.10),
LEFT
CONTACT
GAP
(3.10),
SWINGER CONTACT SPRING
(3.10),
and
LEFT
CONTACT SPRING
(3.10)
adjustments.
(2)
If
break
before
make
requirements
under
(2) and (4)
are
not
met,
refine
RIGHT CONTACT
GAP
(3.10),
LEFT
CONTACT
GAP
(3.10),
SWINGER CONTACT SPRING (3.10),
and
'
Ln'T
CONTACT SPRING (3.10)
adjustments.
(3)
If
any
refinements
are
necessary,
repeat
complete
test
procedure.
Page
100
~
_,:~

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