HP 5315 A Operating And Service Manual page 32

100 mhz universal counter
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Model 5315A/B
Operation
3-14
AErEREI'<C£
"PUlIOUIPuf
AC
power input module permits operation from
100, 120,220,or 240vohs
ac.
The
number
visible
in
the
window indicates
nominal
line voltage to
which instrument must beconnec-
ted
(see
Figure
1-1).
Protective
grounding
conductor
connects to
the
instrument
through
th is
module.
WARNING
ANY
INTERRUPTION
OF
THE
PROTECTIVE
(GROUNDING)
CONDUCTOR
INSIDE OR
OUTSIDE
THE INSTRUMENT
OR DIS-
CONNECTING
OF
THE
PROTECTIVE
EARTH
TERMINAL
IS
LIKELY TO MAKE
THE INSTRUMENT DANGERSOUS.
(See
See-
lion II.)
fREQ
STD
J8
jack. Allow 53158
to
be operated
synchronous
with an
external
standard of
10
megahertz with drive of
1-voh
rms across
soon.
fREQ
STD
select switch must
be set
to EXT
position.
Provides 10
megahertz
internal
standard
signal
for external use when
FREQ
STD
select
switch
is
set to
INT
poSition. With Option
001
installed,
this
is an output
only.
F;gure
3-9. 5315B
Rear Panel
Features

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