The correction
for
the recorded signal on play-back when using the dB
scales
is:
Attenuator
setting on replaying (8) minus
Attenuation
setting
on
record-
ing (3).
When using the
linear
scales
mulitply
by
the ratio:
Attenuator
setting on
recording (3) to
Attenuator
setting on replaying (8).
See
further
Note: (4).
r-------------------------1
7.3.
ANALYSIS
1 1024
I
I
I
I
I
L
Fig.l.l.
Narrow-band frequency analysis
7.3.1. Periodic and Continuous Signals
2307
172080
Either constant bandwidth (Octave)
or
constant percentage bandwidth
(1/3
Octave) analysis ·maybe made. Fig.7.8 shows
an
arrangement
for
a
complete Heterodyne Analyzer
with
constant bandwidth. The recording
procedure
is
automatic.
96
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