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When
the
Generator
is
operating
on
the
internal
reference, a
10-MHz
signal
is
present
at
the
10
MHz OUT
connector on
the
rear panel.
To
meet
the
specified radiated emissions,
this
connector must be
terminated
with
a
BNC
non-shorting dust cap.
A
dust cap,
JF
478982,
is
supplied
with the
Generator,
if
a
cable
is
connected,
it
must be
a double-shielded coaxial
cable
such
as
RG-223
terminated
in
a
SO-ohm
load.
Output
spectral
degradation occurs
if
the
Generator
is
operated on
internal
reference with
an
external reference signal applied.
Figure
2-3
shows
the front panel controls, indicator,
and
connectors
and
Table
2-I
describes
the features.
Figure 2-4
shows
the rear
panel
controls,
connectors,
and
switches
and
Table
2-2 describes the
features.
2-10.
Local Versus
Remote
Operation
Two
modes
of controlling the output of the
Generator
are local
operation
and remote
operation. In the
local
operation
mode,
the
operator
uses the keys
on
the front
panel
to
control
the
Generator.
The
remote
operation
mode
uses
an
IEEE-488
controller to
control the
Generator through
the
IEEE-488
Interface.
An
overview
of
local
operation
is
presented
under
the
heading Local and
Remote
Control Operations.
The
local
and remote
control operations
that
have
similar
entry
methods
are also
described
under
Local
and
Remote
Control
Operations.
The
paragraphs under
the
heading
Remote
Operation
contain
information
on
commands
or descriptions
that pertain
only
to
remote
operations.
2-11.
Power-On Sequence
When
the
Generator
is
turned
on, a
power-on sequence
starts.
During
the
power-on
sequence,
the
microprocessor
tests
the
analog
circuitry,
the
program
ROM,
the
scratch-pad
RAM,
the
compensation
memory,
and
the front panel displays.
The
front panel displays are tested
by
lighting
all
segments
for a brief
period
at
the
same
time
the
rest
of
the
self tests
are
performed.
If
any
of the
self tests
fail,
an
error
code
is
displayed.
If
the
operator
initiates
any
front
panel
entry before the
power-on
sequence
is
completed,
the
self test
is
aborted,
and
the
Generator
is
set
to
the state
it
was
in
when
turned
off.
Table
2-3
lists
the
Instrument
Preset State.
Power-on
instrument
settings that relate to the
IEEE-488
Interface are described
in
the
Remote
Operation paragraphs
in this section.
More
detail
on
the
power-on
self tests
are
explained
in
Section
4D.
2-12.
Changing
Output Parameters
The
six
parameters
of the
Generator
(i.e.,
frequency, amplitude, amplitude
modulation
(AM),
frequency
modulation (FM),
phase
modulation (0M), and
pulse
modulation)
may
be
individually
changed by
at least
one
of three
methods;
Function Entry
Bright-Digit Edit
Entry
Step Entry
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