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HP 8447A - Page 27

HP 8447A
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Operation
Model
8447A
PROMT
AND
REAR
PANELS
1.
LINE
ON/OFF:
Instrument
power
on/off
switch.
2.
INPUT
500:
Connects
input
signal
to
amplifier.
CAUTION
Do
not
apply
more
than
10
volts
dc
to
the
input.
Maximum
power
that
can
be
applied
to
the
input
from
a
50
ohm
source
is
1
Watt.
When
con¬
necting
the
amplifier
to
a
low
im¬
pedance
source,
a
limiting
resistor
must
be
placed
in
series
with
the
input
port
to
limit
the
peak
current
to
a
maximum
of
150
mA.
To
com¬
pute
limiting
resistor,
assume
that
the
input
impedance
can
be
as
low
as
2il
under
overload
conditions.
3.
OUTPUT
500:
Connects
amplifier
output
to
load.
CAUTION
Do
not
apply
more
than
30
volts
dc
to
output.
4.
SELECTOR:
Selects
115
volts
ac
or
230
volts
ac
primary
power.
5.
Fuseholder:
Contains
0.5
ampere
fuse
for
115
or
230
volt
operation.
6.
AC
Power
Connection:
Connects
line
po¬
wer
to
the
instrument.
Figure
3-1.
Front
and
Rear
Panel
Controls
and
Connectors
3-2

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