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(a)
For
a
channelized
output
set
the switch
to
the particular
kHz
spacing required
(5kHz
through
to
60 kHz).
(b)
For
non-channeiized
output
the red
f
position
may
be
selected
to
obtain the
smallest
frequency increments on each
band
(see
page 2-6
Table
1
.)
.
(4)
For large
changes
in
frequency
set
the
TUNE
lever
switch
to
FAST
and
rotate the
TUNE
(spin-wheel)
control
.
Complete
the
channel
tuning with the
TUNE
lever
switch
in
the
SLOW
position.
(5)
To hold
the tuned channel,
set
the
TUNE
lever switch
to
HOLD.
The
TUNE
spin-wheel
control
is
then electronically
disengaged.
(6)
Having
tuned
to
particular
channel,
rapid
changes
to
another
channel can be
made
by operating
the biased
STEP
switch
to
UP
(for
higher frequency)
or
DOWN
for
a
lower frequency.
Each
operation
of the switch
moves
the tuning
by
one
channel,
and
can be repeated
until
the required
channel
is
reached.
(7)
The
FINE
TUNE
control
provides
infinitely
variable tuning
between
frequency
increments.
Set the
FINE
TUNE
lever switch
to
INT
(or to
EXT
if
external fine tuning
is
to
be
used).
Check
that the
adjacent
ON
indicator illuminates.
To
disconnect the
FINE
TUNE
facility set
the lever switch
to
OFF
and
note
that
the
ON
indicator
extinguishes
.
(8)
Set the
METER
switch
to
CW.
(9)
Set the
OUTPUT
switch
to
NORMAL
or to
X2
as
required
(see
description
of
switch functioning on
page
2-8).
In
the
X2
position of
the switch
the
meter
will
indicate
half the true
output
level
.
All facilities
are
available
in
X2
except
AM.
(10)
Set the
METER
switch
to
CW
and
set
the
OUTPUT
LEVEL
(Attenuator)
control
to
the desired output
level
range.
The
switch
markings are
coloured black, green and
red,
which
correspond
to
the colours of
the
associated meter
scales.
(11)
Fine adjustment
of output
level
can be
made
by
the
VERN
I
ER Control
which
has a
range
of 13 dB (+3
dB
and -10 dB
relative
to
the
0 dB
datum on
the red
meter
scale).
For
example
to
obtain a
setting of
-25
dBm
select
-20
dBm
on
the
OUTPUT
level control
and
adjust
the
VERNIER
for
a
meter reading
of
-5dB
.
9081
and 9082 Vol
.
2
2-2
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