Bell 28E Adjustments page 51

Tape Notch Sensing M echanism (continued)
3.18
CONTACT BRACKET {STROBING)
Note: When using the tape notch sensing
7.42
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
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
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
fifth pulse.
(3) Requirement
Contact breaks will be permitted
between the 15 mark and the
of the fifth pulse.
the breaks must not extend beyond
these limits.
To Adjust
Lo osen bracket contact mounting screws.
Position contact bracket to meet require­
ments. Retighten mounting screws.
unit DXD scale.
+10% to strobe these
55 mark of
55 mark of the
55 mark
The magnitude of
ISS 5,
(FOR UNITS WITHOUT TAPE SLACK ARM)
(1)
Requirement
The contact should close no earlier
15
than the mark of the first pulse
and close no later than the
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
fifth pulse.
(3) Requirement
Contact breaks will be permitted
15
between the and
first pulse. The magnitude of the
brea. l { s must not extend beyond these
limits.
To Adjust
Loosen bracket c ontact mounting screws.
Position contact bracket to meet require­
ments. Retighten mounting screws.
SECTION 573-127-703
55 mark
55 mark of the
55
marks of the
Page 51