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HP 3335A - Operating Modes and Parameter Entry; Sweep Mode Operation; Frequency Parameter Entry; Parameter Initialization and Increments

HP 3335A
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Section
HH
groups,
MANUAL
TUNE
and
SWEEP.
Below
the
MANUAL
TUNE
keys
is
a
tuning
knob.
When
the
MANUAL
TUNE
function
is
selected,
a
“flashing”
digit
appears
on
the
display.
The
left
and
right
arrow
digit
keys
can
be
used
to
select
any
digit
to
be
the
“flashing”
digit.
Turning
the
knob
changes
the
frequency
by
the
resolution
of
the
“flashing”
digit.
3-22.
The
SWEEP
subgroup
allows
the
frequency
to
automatically
sweep
a
programmed
set
of
frequencies
determined
by
the
frequency
of
operation
(center
frequency)
and
the
SWEEP
WIDTH
programmed
from
the
FUNCTION
group.
A
manual
sweep
mode
allows
the
user
to
manually
sweep
the
programmed
set
of
frequencies.
To
return
to
keyboard
operation
of
the
other
key
groups,
the
STOP
key
in
the
SWEEP
subgroup
must
be
pressed.
3-23.
Turn-On
Operating
Parameters.
3-24.
When
the
Model
3335A
is
turned
on,
the
output
parameters
of
the
FUNCTION
group
initially
are:
Frequency
1
000
000.
0
Hz
Amplitude
-
86.98
dBm
(50
Q)
-
88.74
dBm
(75
2)
FREQ
INCR
1.0
Hz
AMPTD
INCR
1.0dB
(Note:
For
AMPTD
INCR
display,
the
annuncia-
tor
dBm
is
used
for
dB}
@INCR
1.0
deg
SWEEP
WIDTH
100.0
Hz
3-25.
The
3335A
turns
on
with
the
frequency
displayed.
To
check
the
initial
conditions
of
the
other
operating
parameters,
press
the
key
in
the
FUNCTION
group
of
the
parameter
of
interest.
The
display
should
indicate
the
initial
conditions
stated
in
the
preceding
paragraph.
If
the
instru-
ment
was
not
previously
connected
to
a
power
source
and
in
STBY,
the
out-of-lock
annunciator
“UNLOCKED”
will
be
displayed
until
the
reference
oven
temperature
stabilizes
(<
20
minutes).
If
“UNLOCKED”
is
still
displayed
after
twenty
minutes,
check
to
be
sure
the
BNC-to-BNC
adapter
from
the
10
MHz
REF
OVEN
OUTPUT
connector
to
the
40/N
MHz
Ref
Input
has
been
installed
(see
Figure
6-2,
Item
25).
3-26.
Frequency
Entry.
3-27.
The
3335A
has
a
frequency
range
of
200
Hz
to
80
099
999.
999
Hz
with
resolution
of
0.001
Hz.
The
desired
output
frequency
is
programmed
by
activating
the
FREQUENCY
FUNCTION
key,
DATA
keys
0
through
9
and
a
DATA
ENTRY
key
Hz,
kHz
or
MHz.
A
description
of
these
keys
and
the
frequency
display
indicators
follows.
NOTE
For
the
following
Operating
Instructions,
refer
to
Figure
3-1.
FREQUENCY
Key.
Preface
key
for
entering
frequency.
When
pressed,
the
front
panel
displays
the
present
output
frequency
and
the
controller
is
enabled
to
accept
new
fre-
quency
data.
3-4
Rev.
A
Model
3335A
DATA
Keys.
These
keys
are
used
to
enter
the
desired
fre-
quency.
Notice
that
when
data
is
entered,
the
digits
enter
the
display
from
right
to
left.
Holding
a
digit
key
down
causes
that
digit
to
be
entered
respectively.
If
a
wrong
digit
is
entered,
press
the
BACK
SPACE
key
and
the
right-most
digit
of
the
display
(the
last
digit
entered)
will
be
deleted.
Continue
with
the
correct
entry.
DATA
ENTRY
Keys.
If
an
entry
is
completely
in
error,
the
CLEAR
key
can
be
used
to
reset
the
display
entry
to
zero.
The
correct
entry
can
then
be
made.
An
entry
is
finalized
by
pressing
one
of
the
three
range
keys.
The
display
changes
to
indicate
the
new
output
frequency.
If
an
illegal
entry
has
been
finalized,
the
output
frequency
does
not
change
and
the
display
flashes.
DISPLAY
INDICATORS:
FREQUENCY
Indicator.
Indicates
the
front
panel
is
dis-
playing
the
output
frequency
or
a
frequency
entry.
ENTRY
Indicator.
Indicates
the
front
panel
is
not
display-
ing
the
output
frequency
but
holding
a
frequency
entry
that
has
not
yet
been
finalized
by
a
data
entry
key.
The
numeric
display
indicates
the
output
frequency
pro-
grammed.
The
digits
are
entered
from
right
to
left
as
fre-
quency
digits
are
keyed
in.
The
frequency
can
be
displayed
in
Hz,
kHz
or
MHz
dependent
on
which
range
key
is
pressed.
The
units
of
the
display
can
be
changed
at
any
time
by
pressing
the
desired
range
key.
Example:
Program
a
frequency
of
12345678.901
Hz
Display
Result:
12
345
678.901
Hz
Change
units
to
kHz:
Press
kHz
ENTRY
key.
Display
Result:
12
345.678
901
kHz
Change
units
to
MHz:
Press
MHz
ENTRY
key.
Display
Result:
12.345
678
901
MHz
NOTE
If
the
front
panel
is
displaying
frequency,
it
is
not
necessary
to
preface
a
frequency
entry
with
the
FREQUENCY
key.
3-28.
Frequency
Increment
Entry.
3-29.
Frequency
increment
is
used
when
it
is
desired
to
manually
change
the
frequency
by
a
specified
increment.
The
desired
frequency
increment
is
programmed
by
activating
the
FREQ
INCR
FUNCTION
key,
DATA
keys
0
through
9
and
a
DATA
ENTRY
key
Hz,
kHz
or
MHz
just
as
the
frequency
was
programmed.
A
frequency
increment
of
zero
(no
increment)
can
be
programmed
while
the
maxi-

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