HP 8559A Operation And Service Manual page 269

SERVICE
SYMBOLS USED IN SCHEMATICS AND BLOCK DIAGRAMS
Connection symbol
indicating a Jack (except for
P C board edge connectors)
Connection symbol
indicating a Plug (except for
PC board edge connectors)
Test Point: Terminal
provided for test probe.
Measurement Point: Used to
indicate a convenient point
for measurement. No
terminal provided for test
probe.
COMMONLY USED ASSEMBLY AND CIRCUIT SYMBOLS
Oscillator
FIGURE 81. SYMBOLS USED IN SCHEMATIC AND BLOCK DIAGRAMS (2 OF 4)
BASIC COMPONENT SYMBOLS
@-
Indicates wire or cable color
code. Color code same as
resistor color code. First
number indicates base color,
second and third numbers
indicate colored stripes.
Earth ground
Instrument chassis ground.
May be accompanied by a
number or letter to specify a
particular ground.
Screwdriver adjustment
\
Front-panel control
\
Jumper wire
Mixer
T L
Transmission Line
MODEL 8559A