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"Compressor" is a six-poled Cannon receptacle. It makes possible lhe in-
sertion of inverse shaping networks, in the compressor circuit
,
which may
shape the vibration level/frequency characteristic according to some
parti-
cular vibration test specifications. During "normal" operation of the in-
strument the pins 1 and 5 as well as 2 and 3 should be
short-circuited,
This is automatically taken care of when the special "blind"
plug,
which
is supplied with the instrument upon
delivery,
is inserted in the socket.
"Output Shaft" allows the mechanical connection of an X-Y recorder poten-
tiometer. The potentiometer may also be substituted by a
1
,4,'' extension shaft
which can be used to control other external equipment, as a function of the
frequency variation of the
Oscillator.
"Special Purpose Connector" is a four-poled Cannon receptacle for coJ,mec-
tion from the above mentioned potentiometer to an X-Y recorder
.
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