Diagram; Schematic Diagram Notes - HP 7475A Service Manual

Section
VI
1-A-1-2
6-18
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17
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Model 7475A
SCHEMATIC DIAGRAM NOTES
Resistance in ohms, capacitance in microfarads, inductance in millihenries unless otherwise
noted.
Asterisk denotes a factory-selected value. Value shown is typical. Part might be omitted.
Indicates a NOTE on the schematic diagram.
Tool-aided adjustment.
0
Manual control.
Encloses a front-panel or circuit assembly silkscreened designator.
Encloses a rear-panel silkscreened designator.
Circuit assembly borderline.
Other assembly borderline. Also used to indicate mechanical interconnection (ganging)
and RF shielding.
Heavy line with arrows indicates path and direction of main signal.
Heavy dashed line with arrows indicates path and direction of main feedback .
Indicates cable run with seven lines.
Wiper moves toward CW with clockwise rotation of control (as viewed from shaft or knob).
Numbered Test point. Measurement
aid (metal post, circuit pad, etc.)
provided.
Lettered Test point. No measurement
aid provided.
Encloses wire color code. Code used is the same as the resistor color code. First number
identifies the base color, second number identifies the wider stripe, third number identifies
the narrower stripe (e.g., (947) denotes white base, yellow wide stripe, violet narrow stripe) .
A direct conducting connection to the earth, or a conducting connection to a structure that
has a similar function (e.g., the frame of an air, sea, or land vehicle).
A conducting connection to a chassis or frame.
Common connections. All like-designated points are connected. When accompanied by a
letter, indicates the type common (i.e., A= Analog, D =Digital, F =Floating).
Figure 6-22. Schematic Diagram Notes (Sheet 1 of 2)