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Other
controls
provide
selection
of the
modulation
control, internai/external
frequency
reference,
instrument
status,
and
special
function
modes.
Refer
to
Tables
2-1
and
2-2
for
a
more
complete
discussion.
1-8.
DISPLAY
FIELD
The programmed
values of
modulation,
frequency,
and
amplitude
are
displayed
in
the three
display
fields.
In addition,
when
the
operator
presses the
[STATUS]
key,
uncal
and
reject
entry
codes
are displayed.
The
display
also
prompts
the
operator during
the
software
compensation
procedures.
1-9.
REMOTE-CONTROL PROGRAMMING
The IEEE-488
Interface allows the
Generator
to be
remotely
controlled with
any
IEEE-488
bus
controller.
The
operator
can
also use the
instrument
on
the
IEEE-488
bus without
a
controller
in
a listen-only or talk-only
mode
by
selecting
the
appropriate
Generator
rear
panel
IEEE-488
switch
settings.
All
instrument controls can be
controlled
remotely except
the
POWER
ON
/
OFF
and
the rear
panel
REF
INT/EXT
switches.
The
IEEE-488
Interface
provides
additional
commands
not
available
with
local control,
such
as
data
transfer
and
individual control of internal
I/O
control
bits.
The IEEE-488
Interface allows
two
Generators
to
track amplitude, frequency, or
modulation
in
a
master/
slave
configuration
when
the
operator
uses the front panel step-up
and step-down
entries
on
one
of the instruments.
For
instance,
frequency
tracking
is
convenient for
tests
involving mixers,
and
amplitude
tracking
is
useful for
two-tone intermodulation
testing.
The
specified
frequency range
is
0.10
to
2100
MHz.
The
frequency
is
synthesized
from
a
10-MHz
reference
and
provides
an output
resolution of 10
Hz
from
0.10
to
1050
MHz,
and
20
Hz
from
1050
to
2100
MHz.
The
relative
frequency
mode
allows the operator
to
program
the
frequency
in
relation to
a center
frequency
or
an
offset
frequency. This
is
convenient
for
testing
filters
and
mixers.
The
output frequency
stability
and
accuracy depends
on
the reference,
whether
that reference
is
internal or external.
1-11.
Reference
The
internal
frequency
reference
is
a
lO-MHz
ambient
crystal
oscillator.
If
Option
-130
High
Stability
Reference or
Option
-132
Medium
Stability
Reference
is
installed,
the internal
oscillator
is
locked
to
the
option
oscillator.
With
the
REF
INT/EXT
switch
set
to
EXT,
the
Generator can
be operated
from
an
external
I-,
2-,
2.5-,
5-,
or
10-MHz,
0.3 to
4V
peak-to-peak
sine
or
square-wave
reference
applied
to the
REF
IN
connector.
In
either
position of the
REF
INT/EXT
switch, the
selected
reference
is
available as
a
10-MHz
signal
at
the rear
panel
10
MHz OUT
connector.
The
Generator has
two
specified signal
level
ranges:
+ 16 to
-137
dBm
(I.4IV
to
0.1
fjY)
over a frequency range of 0.10
to
1050
MHz
+ 13 to
-137
dBm
(IV
to
0.033
/jY)
over a frequency
range of 1050
to
2100
MHz.
The programming
limits
are
+17 and
-147.4
dBm,
which
correspond
to
limits
of
1.
58V
to 0.01
fjY.
The
level
entry
can be
in
dBm
or
volts,
or
it
can be converted
from
one
to
the other.
The
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