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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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