Model
8901B
Service
lbble
8A-6.
Schematic
Diagram
Notes
(2
of
11)
Values
for
all componenrs are marked
in
units of farads, henries, and ohms unless otherwise specified.
Asterisk denotes a factory-selected value. Value shown is typical. See Section
V.
?4
Tool-aided adjustment.
0
Encloses front-panel designation.
Encloses rear-panel designation
Circuit assembly borderline.
----
Other assembly borderline.
Heavy line with arrows indicates path and direction of main signal.
Heavy dashed line with arrows indicates
path
and direction of main feedback.
Indicates stripline (Le.,
RF
transmission line above ground).
-f
F-
Wiper moves toward cw with clockwise rotation of control (as viewed from shaft
or
knob).
Numbered Test Point
measurement aid provided.
Encloses wire or cable color code. Code used
is
the same as the resistor color code.
First number identifies the base color, second number identifies the wider stripe, and
the third number identifies the narrower stripe, e.g.,
GEI
denotes white base, yellow
wide stripe, violet narrow stripe.
U
A
direct conducting connection
to
earth, or a conducting connection
to
a structure
that has a similar function (e.g., the frame of an air, sea, or land vehicle).
h
t7
a
12
A
conducting connection
to
a
chassis or frame.
Common connections.
All
like-designation points are connected.
Letter
=
off-page connection.
Number
=
Service Sheet number for off-page connection.
In the example, signal flow is continued
on
Service Sheet
12,
at the point
marked
Number (only)
=
on-page connection.
8A-ll
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