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Controls and Terminals
"Power" toggle
switch controlling
the
on-off switching of the
mains.
Power Switch
Vibration Monitoring
Output
Automatic
Cross-Over Control
Scanning Speed
-------
Multiplier
Scanning Speed
- -
Switch
Compressor Function
Switch
Compressor Speed
Switch
Frequency Range
Switch
~
~
·
-
,:
~
::
i i/..~
"";;;:-
,.'····
. .
•
::::
-···-
~
1018
..
..
•
•
•
•
Velocity
Gen.
Response Switch
-
-mlt-
--
Fu'nction Selector
Switch
~----
Displ.
-
Vel. Range
..--
Sw1tch
-
Frequency Selection
Control
___
Acceleration Range
Switch
__.-
Displacement- Velocity
Level Control
Acceleration
·
Level
Control
Output
Switch
Output Voltage
Control
Frequency Scale
Adjustment
Fig. 2. Front
panel
control
knobs
and
terminal~.
"Oscillator"
telephone jack terminal,
for connecting a stroboscope
to detecl
resonance points on
the
specimen, checking of the
oscillator
wave form, or
monitoring the voltage. With
the
"Output Switch",
Fig.
2,
in position
"Ex.
Oscillator" a
tape recorder
or an external oscillator can
be
connected to
the
cathode-follower output stage of
the instrument.
The
input impedance
of
the
"Oscillator"
terminals is 100
kQ.
"Vibration" telephone jack terminal
for checking and
monitoring the
vibration
level,
e. g. by
means
of a cathode-ray oscilloscope.
"Meter Switch"
connecls
the instrument meter in
a
manner to
show either
the
"Oscillator
Voltage"
,
the
"Vibration
Level"
or
lhe
"Output
Voltage",
see
Fig.
1.
A
further position
of
the
switch
is marked
"Power Freq-Beat" and
used
during calibration of
lhe frequency
scale.
8
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