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BRUEL & KJAER 2203 - Power Supply

BRUEL & KJAER 2203
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factor
of
3
or
less, and ± 1 dB
for
signals
with
a crest
factor
of
5
or
less.
"Fast"
and
"Slow"
meter
dampings
are also provided as specified by IEC
1
79
and described
in
Chapter
1.
See
the
following
references
for
theory
of
RMS
circuits:
1 .
J.
Austin
Hansen:
2. C.
G.
Wahrman:
3. C. G.
Wahrman:
4.8.
POWER
SUPPLY
"RMS
Rectifiers",
B & K Technical
Review
1972
No. 2
"A
True
RMS
Instrument",
B & K Technical
Review
1958
No.3
"Impulse
Noise
Measurement",
B & K Tech-
nical
Review
1
969
No.1
The
power
supply
is a
DC
to
DC
converter
delivering
various
stabilized
and
unstabilized
voltages
to
the
amplifier
circuits
and
the
polariza-
tion
voltage
to
the
Condenser
Microphone.
Polarization voltage
stability
with
temperature
variation
is less
than
0,1 dB. The
power
supply
will
operate
correctly
from
a voltage
of
3,0
to
4,6
V DC.
The
converter
operates
at
a
frequency
of
approximately
1 kHz and also
provides
the
signal
for
the
built-in
reference
voltage
.
29

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