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©
MODULATION
FREQUENCY
(lever)
Switch.
This
switch provides a
choice
of three
internal
modulation
frequencies.
©
METER
(lever)
Switch.
This
switch connects the
meter
to
the
appropriate function
and
thus ensures the
correct type of indication
for
the
mode
in
use.
©
OUTPUT
LEVEL
(Rotary)
Switch
.
This switch selects the
lOdB
steps
of
an
attenuator, calibrated
in
both
dBm
and
mV
.
The
switch markings are coloured
to
correspond
with the
scales
on
the meter.
Each
switch
setting
corresponds
to
OdBon
the
red
meter
scale,
with 13dB variation available by
means
of the
VERNIER
control
.
©
VERNIER
Control
.
This
potentiometer provides
variation of
+3dB
to
-lOdB on any
setting
of the
OUTPUT
LEVEL
swi tch
.
©
OUTPUT
Switch.
(1)
NORMAL:
in this
position the
maximum
output
is
+3dBm
(+13dBm
for
models
9081
H
and 9082H)
into
50Q.
(2)
OFF:
in this
position the
r.f.
source
(the synthesizer)
is
inhibited.
There
is
no output and the
display reads
'all
zeros',
but the
remainder
of the
instrument remains
in
operation.
(3)
X2:
in
this
position
the
true
output
is
twice
the reading
shown on
the
meter
.
Full
CW
and
F/\V0M
facilities
are
available but the
AM
mode
is
not
operative.
The
symbol
advises the
user
to
consult the
handbook
for
operational
details.
©
Meter.
The
meter
displays
the output information
corresponding
to
the function selected
by
the
adjacent
METER
switch.
In
the
X2
position
of
the
OUTPUT
switch the
meter
reading
on
CW
must
be doubled
to
obtain the
true
value.
©
50Q
Output
Socket.
The
output socket
is
a
50Q
Type
-N!
.
©
+1
2V
Socket
.
Provides a
+12V
supply output
for
the reverse
power
protection option.
9081 and
9082 Vol
.
2
ND
1
CO
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