Racal Instruments 9081 Maintenance Manual page 31

Synthesized signal generators
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TUNE
(lever)
Switch.
TUNE
(Spin-Wheel)
Control.
(1)
In
the
FAST
position of the
switch the
TUNE
spin-wheel
provides rapid tuning
(approximately
30
revolutions per
band)
with a four-digit frequency display.
(2)
In
the
SLOW
position the
TUNE
spin-
wheel
is
de-sensitized
to
approximately
20
channels
per revolution, with a
six-
digit
display.
(3)
The
HOLD
position
electronically
disengages
the
TUNE
spin-wheel
and
gives
an
eight-digit display.
This control
provides
frequency
tuning
in
the
FAST
and
SLOW
positions of the
associated
TUNE
switch,
as
described
above.
2-5
9081
&
9082
Vol
.
2

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