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CHAPTER
2
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INTRODUCTION
2.1
Until familiar
with the instrument
the user
is
recommended
to
refer
to
the
description of controls
commencing on
page 2-4.
POWER
SUPPLY
AND
FREQUENCY STANDARD
2.2
(1)
If
using the instrument
for
the
first
time, or
at
a
new
location, verify
that
the
a.c.
(mains) voltage selection
is
correct.
Refer
to
para. 5.1.
(2)
Connect
the
a.c.
(mains) supply lead
to
the rear panel three-pin plug.
(3)
Set the
front
panel
POWER
switch
to
ON.
Verify
that the
adjacent
LED
illuminates.
(4)
Set the rear panel
STANDARD
switch
to
the required position,
according
to
whether
internal, or external,
frequency
standard
is
to
be
used.
(5)
From
cold switch-on, the
approximate
warm-up
time
for
the internal
frequency
standard
to
reach operating
accuracy
is:-
(a)
Six minutes (with standard
9442
unit)
.
,
(b)
With
the optional
9420M
allow 10 minutes
to
reach
1
in
10
,
or
20
minutes
to
reach
optimum
accuracy.
OPERATING
2.3.
RF Tuning
(1)
Set the
RANGE MHz
switch
to
the required
frequency band.
(2)
Set the
TUNE
lever switch
to
FAST
and
the
FINE
TUNE
lever switch
to
OFF.
(3)
Set the
CHANNEL
SPACING
(kHz)
switch
according
to
the
type of operation
required
as follows:-
9081
&
9082
Vol.2
2-1
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