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3.18
Tape Notch Sensing Mechanism (continued)
CONTACT BRACKET {STROBING)
Note: When using the tape notch sensing
use a 7.42 unit
DXD
scale.
Synchronize the transmitter distributor
so that the end of the stop pulse image is
in line with the end of the stop pulse on the
DXD
scale when transmission is continuous.
Use a normal direct current line signal of
60 rna +10% or 20 rna +10% to strobe these
contacts.
(FOR UNITS WITH TAPE SLACK ARM)
(1) Requirement
The contact should open no earlier
than the 15 mark of the first pulse
and open no later than the 55 mark of
the first pulse.
(2) Requirement
The contact should close no earlier
than the
15 mark of the fifth pulse and
close no later than the 55 mark of the
fifth pulse.
(3) Requirement
Contact breaks will be permitted
between the
15 mark and the 55 mark
of the fifth pulse. The magnitude of
the breaks must not extend beyond
these limits.
To Adjust
Loosen bracket contact mounting screws.
Position contact bracket to meet require­
ments. Retighten mounting screws.
ISS 5, SECTION 573-127-703
(FOR UNITS WITHOUT TAPE SLACK ARM)
(1) Requirement
The contact should close no earlier
than the
15 mark of the first pulse
and close no later than the 55 mark
of the first pulse.
(2) Requirement
The contact should open no earlier
than the
15 mark of the fifth pulse and
open no later than the 55 mark of the
fifth pulse.
(3) Requirement
Contact breaks will be permitted
between the
15
and
55
marks of the
first pulse. The magnitude of the
brea.l{s must not extend beyond these
limits.
To Adjust
Loosen bracket contact mounting screws.
Position contact bracket to meet require­
ments. Retighten mounting screws.
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