Racal Instruments 9081 Maintenance Manual page 26

1
.7
The meter indicates both external
and
internal
modulation, and,
as these
can be
applied simultaneously, various arrangements
of
multiple
modulation
are feasible
(see
para 2.4).
POWER
SUPPLY
1
.8
The instruments
operate from nominal
1
10V
or
220V
a.c. supplies,
45
to
440Hz.
Mains voltage selection
is
by
means
of
two
rear
panel switches
which
provide four
possible
voltage selections
and can be locked
to
the
chosen
positions
by a
screwed
plate,
which
allows the selected voltage
range markings
to
be seen. Refer
to
para. 5.1.
HANDBOOK
NOTES
Frequency
Range
1
.9
Although the
signal
generators
have
a specified operating
range extending
to
520MHz,
the design capability
is
at least
540MHz.
This
higher figure
with
its
range sub-
divisions
is
used
in
the technical descriptions
except
when
referring to
the actual operating
ranges.
1-2
9081
&
9082 Vol. 2