(2) Record the Reference Signal
from
the
AC
OUTPUT
of
the 2209.
(3) Note the
ATTENUATOR
setting
and
the METER deflection.
(4)
Without
altering the controls
of
the Tape Recorder make the
recording. (Note: Adjust the
ATTENUATORS
of
the 2209 in order
to
maintain the best possible signal-to-noise ratio. Make a note
of
the
adjustments~
and add on or subtract the difference
from
the
reference attenuator
level (3) accordingly).
Tape Recorder
Fig.7.6. Reproduction
of
sound
or
vibration data
(5)
Replay the Reference signal
and
feed
it
into
the 2209.
··.·;, ·•
-·-
2209
172085
(6) Adjust the
ATTENUATORS
until
the Meter Needle deflects.
(7) With a small screwdriver
turn
the
GAl
N ADJ.
until
the Meter de-
flection
is
the
same
as
in (3).
(8) Note the
ATTENUATOR
setting.
(9)
Without
altering the controls
of
the Tape Recorder replay the
recording (noting any change in attenuation necessary
for
optimum
signal-to-noise ratio).
95
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